Make monochrome use the same copy of licenses as chrome

1. Compare chrome and webview licenses, and add the Chromium project license;
2. Get the Brotli decompression function and put it in component/about_ui/;
3. make monochrome call the function via JNI.

Bug: 688077
Change-Id: I125dce46f85d3b268d9cee6d19249905f79f0209
Reviewed-on: https://chromium-review.googlesource.com/497870
Commit-Queue: Yipeng Wang <yipengw@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Kunihiko Sakamoto <ksakamoto@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Reviewed-by: Dan Beam <dbeam@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#478052}

android_webview/BUILD.gn

@@ -191,11 +191,7 @@ android_assets("pak_file_assets") {
 # These assets are needed by both monochrome and stand alone WebView, but not by
 # Chrome.
 android_assets("monochrome_webview_assets") {
-  sources = [
-    webview_license_path,
-  ]
   deps = [
-    ":generate_webview_license_notice",
     "//third_party/icu:icu_assets",
     "//v8:v8_external_startup_data_assets",
   ]

android_webview/apk/BUILD.gn

@@ -0,0 +1,15 @@
+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build/config/android/rules.gni")
+
+# Since Monochrome has its own content provider, these two files are put
+# in two different targets.
+android_library("webview_license_provider_java") {
+  java_files = [ "//android_webview/apk/java/src/com/android/webview/chromium/LicenseContentProvider.java" ]
+}
+
+android_library("webview_license_activity_java") {
+  java_files = [ "//android_webview/apk/java/src/com/android/webview/chromium/LicenseActivity.java" ]
+}

android_webview/glue/java/src/com/android/webview/chromium/LicenseActivity.java → android_webview/apk/java/src/com/android/webview/chromium/LicenseActivity.java

@@ -17,18 +17,20 @@
  * other than LicenseContentProvider.
  */
 public class LicenseActivity extends Activity {
+    private static final String LICENSES_URI_SUFFIX = "LicenseContentProvider/webview_licenses";
+    private static final String LICENSES_CONTENT_TYPE = "text/html";
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         final String packageName = getPackageName();
         final Intent intent = new Intent(Intent.ACTION_VIEW);
-        final String licenseUri = String.format("content://%s.%s",
-                packageName, LicenseContentProvider.LICENSES_URI_SUFFIX);
-        intent.setDataAndType(
-                Uri.parse(licenseUri), LicenseContentProvider.LICENSES_CONTENT_TYPE);
+        final String licenseUri =
+                String.format("content://%s.%s", packageName, LICENSES_URI_SUFFIX);
+        intent.setDataAndType(Uri.parse(licenseUri), LICENSES_CONTENT_TYPE);
         intent.addCategory(Intent.CATEGORY_DEFAULT);
-        final int titleId = getResources().getIdentifier(
-                "license_activity_title", "string", packageName);
+        final int titleId =
+                getResources().getIdentifier("license_activity_title", "string", packageName);
         if (titleId != 0) {
             intent.putExtra(Intent.EXTRA_TITLE, getString(titleId));
         }

android_webview/glue/java/src/com/android/webview/chromium/LicenseContentProvider.java → android_webview/apk/java/src/com/android/webview/chromium/LicenseContentProvider.java

@@ -68,8 +68,7 @@ public String getType(Uri uri) {
     }
 
     @Override
-    public int update(Uri uri, ContentValues values, String where,
-                      String[] whereArgs) {
+    public int update(Uri uri, ContentValues values, String where, String[] whereArgs) {
         throw new UnsupportedOperationException();
     }
 
@@ -84,8 +83,8 @@ public Uri insert(Uri uri, ContentValues values) {
     }
 
     @Override
-    public Cursor query(Uri uri, String[] projection, String selection,
-                        String[] selectionArgs, String sortOrder) {
+    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
+            String sortOrder) {
         throw new UnsupportedOperationException();
     }
-}
+}

android_webview/glue/BUILD.gn

@@ -61,8 +61,6 @@ android_library("glue") {
     "java/src/com/android/webview/chromium/DrawGLFunctor.java",
     "java/src/com/android/webview/chromium/GeolocationPermissionsAdapter.java",
     "java/src/com/android/webview/chromium/GraphicsUtils.java",
-    "java/src/com/android/webview/chromium/LicenseActivity.java",
-    "java/src/com/android/webview/chromium/LicenseContentProvider.java",
     "java/src/com/android/webview/chromium/MonochromeLibraryPreloader.java",
     "java/src/com/android/webview/chromium/ServiceWorkerClientAdapter.java",
     "java/src/com/android/webview/chromium/ServiceWorkerControllerAdapter.java",

chrome/android/chrome_public_apk_tmpl.gni

@@ -122,9 +122,11 @@ template("monochrome_public_apk_tmpl") {
     }
     deps += [
       "//android_webview:monochrome_webview_assets",
+      "//android_webview/apk:webview_license_activity_java",
       "//android_webview/glue",
       "//chrome/android:chrome_public_non_pak_assets",
       "//chrome/android:monochrome_pak_assets",
+      "//chrome/android/monochrome:monochrome_license_provider_java",
     ]
 
     if (!is_java_debug) {

chrome/android/monochrome/BUILD.gn

@@ -0,0 +1,16 @@
+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build/config/android/rules.gni")
+
+android_library("monochrome_license_provider_java") {
+  java_files =
+      [ "java/src/com/android/webview/chromium/LicenseContentProvider.java" ]
+
+  deps = [
+    "//base:base_java",
+    "//chrome/android:chrome_java",
+    "//components/about_ui/android:aboutui_java",
+  ]
+}

chrome/android/monochrome/java/DEPS

@@ -0,0 +1,3 @@
+include_rules = [
+  "+components/about_ui/android/java",
+]

chrome/android/monochrome/java/src/com/android/webview/chromium/LicenseContentProvider.java

@@ -0,0 +1,99 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package com.android.webview.chromium;
+
+import android.annotation.TargetApi;
+import android.content.ContentProvider;
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+
+import org.chromium.base.ThreadUtils;
+import org.chromium.base.library_loader.ProcessInitException;
+import org.chromium.chrome.browser.init.ChromeBrowserInitializer;
+import org.chromium.components.aboutui.CreditUtils;
+
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+/**
+ * Content provider for the OSS licenses file.
+ */
+@TargetApi(Build.VERSION_CODES.KITKAT)
+public class LicenseContentProvider
+        extends ContentProvider implements ContentProvider.PipeDataWriter<String> {
+    public static final String LICENSES_URI_SUFFIX = "LicenseContentProvider/webview_licenses";
+    public static final String LICENSES_CONTENT_TYPE = "text/html";
+    private static final String TAG = "LicenseCP";
+
+    @Override
+    public boolean onCreate() {
+        return true;
+    }
+
+    @Override
+    public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
+        if (uri != null && uri.toString().endsWith(LICENSES_URI_SUFFIX)) {
+            return openPipeHelper(null, null, null, "webview_licenses.notice", this);
+        }
+        return null;
+    }
+
+    @Override
+    public void writeDataToPipe(
+            ParcelFileDescriptor output, Uri uri, String mimeType, Bundle opts, String filename) {
+        try (OutputStream out = new FileOutputStream(output.getFileDescriptor());) {
+            ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+                @Override
+                public void run() {
+                    try {
+                        ChromeBrowserInitializer.getInstance(getContext())
+                                .handleSynchronousStartup();
+                    } catch (ProcessInitException e) {
+                        Log.e(TAG, "Fail to initialize the Chrome Browser.", e);
+                    }
+                }
+            });
+            out.write(CreditUtils.nativeGetJavaWrapperCredits());
+        } catch (IOException e) {
+            Log.e(TAG, "Failed to write the license file", e);
+        }
+    }
+
+    @Override
+    public String getType(Uri uri) {
+        if (uri != null && uri.toString().endsWith(LICENSES_URI_SUFFIX)) {
+            return LICENSES_CONTENT_TYPE;
+        }
+        return null;
+    }
+
+    @Override
+    public int update(Uri uri, ContentValues values, String where, String[] whereArgs) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public int delete(Uri uri, String selection, String[] selectionArgs) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Uri insert(Uri uri, ContentValues values) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
+            String sortOrder) {
+        throw new UnsupportedOperationException();
+    }
+}

chrome/browser/ui/BUILD.gn

@@ -486,6 +486,7 @@ split_static_library("ui") {
     "//chrome/common:instant_mojom",
     "//chrome/common/net",
     "//chrome/installer/util:with_no_strings",
+    "//components/about_ui",
     "//components/app_modal",
     "//components/autofill/content/browser:risk_proto",
     "//components/autofill/core/browser",

chrome/browser/ui/webui/DEPS

@@ -1,4 +1,5 @@
 include_rules = [
+  "+components/about_ui"
   "+components/invalidation",
   "+components/onc",
   "+components/proximity_auth",

chrome/browser/ui/webui/about_ui.cc

@@ -49,6 +49,7 @@
 #include "chrome/grit/browser_resources.h"
 #include "chrome/grit/chromium_strings.h"
 #include "chrome/grit/generated_resources.h"
+#include "components/about_ui/credit_utils.h"
 #include "components/grit/components_resources.h"
 #include "components/strings/grit/components_locale_settings.h"
 #include "content/public/browser/browser_thread.h"
@@ -691,32 +692,14 @@ void AboutUIHTMLSource::StartDataRequest(
       idr = IDR_KEYBOARD_UTILS_JS;
 #endif
 
-    base::StringPiece raw_response =
-        ResourceBundle::GetSharedInstance().GetRawDataResource(idr);
     if (idr == IDR_ABOUT_UI_CREDITS_HTML) {
-      const uint8_t* next_encoded_byte =
-          reinterpret_cast<const uint8_t*>(raw_response.data());
-      size_t input_size_remaining = raw_response.size();
-      BrotliDecoderState* decoder =
-          BrotliDecoderCreateInstance(nullptr /* no custom allocator */,
-                                      nullptr /* no custom deallocator */,
-                                      nullptr /* no custom memory handle */);
-      CHECK(!!decoder);
-      while (!BrotliDecoderIsFinished(decoder)) {
-        size_t output_size_remaining = 0;
-        CHECK(BrotliDecoderDecompressStream(
-                  decoder, &input_size_remaining, &next_encoded_byte,
-                  &output_size_remaining, nullptr,
-                  nullptr) != BROTLI_DECODER_RESULT_ERROR);
-        const uint8_t* output_buffer =
-            BrotliDecoderTakeOutput(decoder, &output_size_remaining);
-        response.insert(response.end(), output_buffer,
-                        output_buffer + output_size_remaining);
-      }
-      BrotliDecoderDestroyInstance(decoder);
+      response = about_ui::GetCredits(true /*include_scripts*/);
     } else {
-      response = raw_response.as_string();
+      response = ResourceBundle::GetSharedInstance()
+                     .GetRawDataResource(idr)
+                     .as_string();
     }
+
 #if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
   } else if (source_name_ == chrome::kChromeUIDiscardsHost) {
     response = AboutDiscards(path);

components/about_ui/BUILD.gn

@@ -0,0 +1,21 @@
+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+static_library("about_ui") {
+  sources = [
+    "credit_utils.cc",
+    "credit_utils.h",
+  ]
+  deps = [
+    "//base",
+    "//components/resources:components_resources",
+    "//third_party/brotli:dec",
+    "//ui/base",
+    "//ui/resources",
+  ]
+
+  if (is_android) {
+    deps += [ "//components/about_ui/android:about_ui_jni_headers" ]
+  }
+}

components/about_ui/DEPS

@@ -0,0 +1,6 @@
+include_rules = [
+  "+components/grit/components_resources.h",
+  "+jni",
+  "+third_party/brotli",
+  "+ui/base",
+]

components/about_ui/android/BUILD.gn

@@ -0,0 +1,18 @@
+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+import("//build/config/android/rules.gni")
+
+generate_jni("about_ui_jni_headers") {
+  sources = [
+    "java/src/org/chromium/components/aboutui/CreditUtils.java",
+  ]
+  jni_package = "components/about_ui"
+}
+
+android_library("aboutui_java") {
+  java_files = [ "java/src/org/chromium/components/aboutui/CreditUtils.java" ]
+  deps = [
+    "//base:base_java",
+  ]
+}

components/about_ui/android/OWNERS

@@ -0,0 +1,2 @@
+agrieve@chromium.org
+torne@chromium.org

components/about_ui/android/java/src/org/chromium/components/aboutui/CreditUtils.java

@@ -0,0 +1,16 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.components.aboutui;
+
+import org.chromium.base.annotations.JNINamespace;
+
+/** Credits-related utilities. */
+@JNINamespace("about_ui")
+public class CreditUtils {
+    private CreditUtils() {}
+
+    /** Returns a string containing the content of about_credits.html. */
+    public static native byte[] nativeGetJavaWrapperCredits();
+}