Support using loadable module for libpeerconnection on Android.

Borrowed create_standalone_apk_action.gypi, create_standalone_apk.py and finalize_apk_action.gypi from https://codereview.chromium.org/14843017/ with some minor fix in create_standalone_apk_action.gypi.

For some cases where libpeerconnection needs to be a loadable module, we need to add libpeerconnection.so into Chrome_apk.
This patch takes 2 steps:
1. build chrome with libpeer_target_type=loadable_module.
2. add libpeerconnection.so into the apk file.

TEST=run gyp: GYP_DEFINES="$GYP_DEFINES libpeer_target_type=loadable_module" build/gyp_chromium
     build chrome
     re-run gyp: GYP_DEFINES="$GYP_DEFINES libpeer_target_type=loadable_module" CHROMIUM_GYP_FILE="build/android/chrome_with_libs.gyp" build/gyp_chromium
     build chrome_with_libs
     install Chrome-with-libs.apk and it works for https://apprtc.appspot.com

R=cjhopman@chromium.org, mallinath@chromium.org, tommi@chromium.org

Review URL: https://codereview.chromium.org/17569006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@208246 0039d316-1c4b-4281-b951-d872f2087c98

build/android/chrome_with_libs.gyp

@@ -0,0 +1,82 @@
+# Copyright 2013 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.
+
+# This file is meant to add more loadable libs into Chrome_apk.
+#
+# This is useful when building Chrome_apk with some loadable modules which are
+# not included in Chrome_apk.
+# As an example, when building Chrome_apk with
+# libpeer_target_type=loadable_module,
+# the libpeerconnection.so is not included in Chrome_apk. To add the missing
+# lib, follow the steps below:
+# - Run gyp:
+#     GYP_DEFINES="$GYP_DEFINES libpeer_target_type=loadable_module" CHROMIUM_GYP_FILE="build/android/chrome_with_libs.gyp" build/gyp_chromium
+# - Build chrome_with_libs:
+#     ninja (or make) chrome_with_libs
+#
+# This tool also allows replacing the loadable module with a new one via the
+# following steps:
+# - Build Chrome_apk with the gyp define:
+#     GYP_DEFINES="$GYP_DEFINES libpeer_target_type=loadable_module" build/gyp_chromium
+#     ninja (or make) Chrome_apk
+# - Replace libpeerconnection.so with a new one:
+#     cp the_new_one path/to/libpeerconnection.so
+# - Run gyp:
+#     GYP_DEFINES="$GYP_DEFINES libpeer_target_type=loadable_module" CHROMIUM_GYP_FILE="build/android/chrome_with_libs.gyp" build/gyp_chromium
+# - Build chrome_with_libs:
+#     ninja (or make) chrome_with_libs
+{
+  'targets': [
+    {
+      # An "All" target is required for a top-level gyp-file.
+      'target_name': 'All',
+      'type': 'none',
+      'dependencies': [
+        'chrome_with_libs',
+      ],
+    },
+    {
+      'target_name': 'chrome_with_libs',
+      'type': 'none',
+      'variables': {
+        'intermediate_dir': '<(PRODUCT_DIR)/prebuilt_libs/',
+        'chrome_unsigned_path': '<(PRODUCT_DIR)/chrome_apk/Chrome-unsigned.apk',
+        'chrome_with_libs_unsigned': '<(intermediate_dir)/Chrome-with-libs-unsigned.apk',
+        'chrome_with_libs_final': '<(PRODUCT_DIR)/apks/Chrome-with-libs.apk',
+      },
+      'dependencies': [
+        '<(DEPTH)/clank/native/framework/clank.gyp:chrome_apk'
+      ],
+      'copies': [
+        {
+          'destination': '<(intermediate_dir)/lib/<(android_app_abi)',
+          'files': [
+            '<(PRODUCT_DIR)/libpeerconnection.so',
+          ],
+        },
+      ],
+      'actions': [
+        {
+          'action_name': 'put_libs_in_chrome',
+          'variables': {
+            'inputs': [
+              '<(intermediate_dir)/lib/<(android_app_abi)/libpeerconnection.so',
+            ],
+            'input_apk_path': '<(chrome_unsigned_path)',
+            'output_apk_path': '<(chrome_with_libs_unsigned)',
+            'libraries_top_dir%': '<(intermediate_dir)',
+          },
+          'includes': [ 'create_standalone_apk_action.gypi' ],
+        },
+        {
+          'action_name': 'finalize_chrome_with_libs',
+          'variables': {
+            'input_apk_path': '<(chrome_with_libs_unsigned)',
+            'output_apk_path': '<(chrome_with_libs_final)',
+          },
+          'includes': [ 'finalize_apk_action.gypi'],
+        },
+      ],
+    }],
+}

build/android/create_standalone_apk.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python
+#
+# Copyright 2013 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.
+
+"""Combines stripped libraries and incomplete APK into single standalone APK.
+
+"""
+
+import optparse
+import os
+import shutil
+import sys
+import tempfile
+
+from util import build_utils
+from util import md5_check
+
+def CreateStandaloneApk(options):
+  def DoZip():
+    with tempfile.NamedTemporaryFile(suffix='.zip') as intermediate_file:
+      intermediate_path = intermediate_file.name
+      shutil.copy(options.input_apk_path, intermediate_path)
+      apk_path_abs = os.path.abspath(intermediate_path)
+      build_utils.CheckCallDie(
+          ['zip', '-r', '-1', apk_path_abs, 'lib'],
+          cwd=options.libraries_top_dir,
+          suppress_output=True)
+      shutil.copy(intermediate_path, options.output_apk_path)
+
+  input_paths = [options.input_apk_path, options.libraries_top_dir]
+  record_path = '%s.standalone.stamp' % options.input_apk_path
+  md5_check.CallAndRecordIfStale(
+      DoZip,
+      record_path=record_path,
+      input_paths=input_paths)
+
+
+def main(argv):
+  parser = optparse.OptionParser()
+  parser.add_option('--libraries-top-dir',
+      help='Top directory that contains libraries '
+      '(i.e. library paths are like '
+      'libraries_top_dir/lib/android_app_abi/foo.so).')
+  parser.add_option('--input-apk-path', help='Path to incomplete APK.')
+  parser.add_option('--output-apk-path', help='Path for standalone APK.')
+  parser.add_option('--stamp', help='Path to touch on success.')
+  options, _ = parser.parse_args()
+
+  required_options = ['libraries_top_dir', 'input_apk_path', 'output_apk_path']
+  build_utils.CheckOptions(options, parser, required=required_options)
+
+  CreateStandaloneApk(options)
+
+  if options.stamp:
+    build_utils.Touch(options.stamp)
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))

build/android/create_standalone_apk_action.gypi

@@ -0,0 +1,41 @@
+# Copyright 2013 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.
+
+# This file is meant to be included into an action to provide an action that
+# combines a directory of shared libraries and an incomplete APK into a
+# standalone APK.
+#
+# To use this, create a gyp action with the following form:
+#  {
+#    'action_name': 'some descriptive action name',
+#    'variables': {
+#      'inputs': [ 'input_path1', 'input_path2' ],
+#      'input_apk_path': '<(unsigned_apk_path)',
+#      'output_apk_path': '<(unsigned_standalone_apk_path)',
+#      'libraries_top_dir': '<(libraries_top_dir)',
+#    },
+#    'includes': [ 'relative/path/to/create_standalone_apk_action.gypi' ],
+#  },
+
+{
+  'message': 'Creating standalone APK: <(output_apk_path)',
+  'variables': {
+    'inputs': [],
+  },
+  'inputs': [
+    '<(DEPTH)/build/android/gyp/util/build_utils.py',
+    '<(DEPTH)/build/android/gyp/create_standalone_apk.py',
+    '<(input_apk_path)',
+    '>@(inputs)',
+  ],
+  'outputs': [
+    '<(output_apk_path)',
+  ],
+  'action': [
+    'python', '<(DEPTH)/build/android/gyp/create_standalone_apk.py',
+    '--libraries-top-dir=<(libraries_top_dir)',
+    '--input-apk-path=<(input_apk_path)',
+    '--output-apk-path=<(output_apk_path)',
+  ],
+}

build/android/finalize_apk_action.gypi

@@ -0,0 +1,46 @@
+# Copyright 2013 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.
+
+# This file is meant to be included into an action to provide an action that
+# signs and zipaligns an APK.
+#
+# To use this, create a gyp action with the following form:
+#  {
+#    'action_name': 'some descriptive action name',
+#    'variables': {
+#      'inputs': [ 'input_path1', 'input_path2' ],
+#      'input_apk_path': 'relative/path/to/input.apk',
+#      'output_apk_path': 'relative/path/to/output.apk',
+#    },
+#    'includes': [ '../../build/android/finalize_apk.gypi' ],
+#  },
+#
+
+{
+  'message': 'Signing/aligning <(_target_name) APK: <(input_apk_path).',
+  'variables': {
+    'inputs': [],
+    'keystore_path%': '<(DEPTH)/build/android/ant/chromium-debug.keystore',
+  },
+  'inputs': [
+    '<(DEPTH)/build/android/gyp/util/build_utils.py',
+    '<(DEPTH)/build/android/gyp/finalize_apk.py',
+    '<(keystore_path)',
+    '<(input_apk_path)',
+    '>@(inputs)',
+  ],
+  'outputs': [
+    '<(output_apk_path)',
+  ],
+  'action': [
+    'python', '<(DEPTH)/build/android/gyp/finalize_apk.py',
+    '--android-sdk-root=<(android_sdk_root)',
+    '--unsigned-apk-path=<(input_apk_path)',
+    '--final-apk-path=<(output_apk_path)',
+    '--keystore-path=<(keystore_path)',
+
+    # TODO(newt): remove this once crbug.com/177552 is fixed in ninja.
+    '--ignore=>!(echo \'>(_inputs)\' | md5sum)',
+  ],
+}

third_party/libjingle/libjingle.gyp

@@ -898,13 +898,12 @@
             'libjingle_webrtc_common',
           ],
           'conditions': [
-            ['libpeer_allocator_shim==1 and '
-             'libpeer_target_type!="static_library"', {
+            ['libpeer_target_type!="static_library"', {
               'sources': [
                 'overrides/initialize_module.cc',
               ],
               'conditions': [
-                ['OS!="mac"', {
+                ['OS!="mac" and OS!="android"', {
                   'sources': [
                     'overrides/allocator_shim/allocator_proxy.cc',
                   ],
@@ -936,7 +935,7 @@
             ['OS=="mac" and libpeer_target_type!="static_library"', {
               'product_name': 'libpeerconnection',
             }],
-            ['OS=="android"', {
+            ['OS=="android" and "<(libpeer_target_type)"=="static_library"', {
               'standalone_static_library': 1,
             }],
             ['OS=="linux" and libpeer_target_type!="static_library"', {

third_party/libjingle/overrides/allocator_shim/allocator_proxy.cc

@@ -8,8 +8,8 @@
 #error "Only compile the allocator proxy with the shared_library implementation"
 #endif
 
-#if defined(OS_MACOSX)
-#error "The allocator proxy isn't supported (or needed) on mac."
+#if defined(OS_MACOSX) || defined(OS_ANDROID)
+#error "The allocator proxy isn't supported (or needed) on mac or android."
 #endif
 
 extern AllocateFunction g_alloc;

third_party/libjingle/overrides/allocator_shim/allocator_stub.cc

@@ -4,8 +4,8 @@
 
 #include "allocator_shim/allocator_stub.h"
 
-#if defined(OS_MACOSX)
-#error "The allocator stub isn't supported (or needed) on mac."
+#if defined(OS_MACOSX) || defined(OS_ANDROID)
+#error "The allocator stub isn't supported (or needed) on mac or android."
 #endif
 
 void* Allocate(std::size_t n) {

third_party/libjingle/overrides/allocator_shim/allocator_stub.h

@@ -9,7 +9,7 @@
 
 #include "base/basictypes.h"
 
-#if !defined(OS_MACOSX)
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 
 typedef void* (*AllocateFunction)(std::size_t);
 typedef void (*DellocateFunction)(void*);
@@ -19,6 +19,6 @@ typedef void (*DellocateFunction)(void*);
 void* Allocate(std::size_t n);
 void Dellocate(void* p);
 
-#endif  // OS_MACOSX
+#endif  // OS_MACOSX && OS_ANDROID
 
 #endif  // THIRD_PARTY_LIBJINGLE_OVERRIDES_ALLOCATOR_SHIM_ALLOCATOR_STUB_H_

third_party/libjingle/overrides/init_webrtc.cc

@@ -61,6 +61,10 @@ static base::FilePath GetLibPeerConnectionPath() {
   CHECK(PathService::Get(base::DIR_MODULE, &path));
   path = path.Append(FILE_PATH_LITERAL("Libraries"))
              .Append(FILE_PATH_LITERAL("libpeerconnection.so"));
+#elif defined(OS_ANDROID)
+  base::FilePath path;
+  CHECK(PathService::Get(base::DIR_MODULE, &path));
+  path = path.Append(FILE_PATH_LITERAL("libpeerconnection.so"));
 #else
   base::FilePath path;
   CHECK(PathService::Get(base::DIR_MODULE, &path));
@@ -94,7 +98,7 @@ bool InitializeWebRtcModule() {
   // PS: This function is actually implemented in allocator_proxy.cc with the
   // new/delete overrides.
   return initialize_module(*CommandLine::ForCurrentProcess(),
-#if !defined(OS_MACOSX)
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
       &Allocate, &Dellocate,
 #endif
       logging::GetLogMessageHandler(),

third_party/libjingle/overrides/init_webrtc.h

@@ -40,7 +40,7 @@ typedef void (*DestroyWebRtcMediaEngineFunction)(
 // to go through GetProcAddress et al and rely on specific name mangling.
 typedef bool (*InitializeModuleFunction)(
     const CommandLine& command_line,
-#if !defined(OS_MACOSX)
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
     AllocateFunction alloc,
     DellocateFunction dealloc,
 #endif

third_party/libjingle/overrides/initialize_module.cc

@@ -20,7 +20,7 @@
 #define ALLOC_EXPORT __attribute__((visibility("default")))
 #endif
 
-#if !defined(OS_MACOSX)
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 // These are used by our new/delete overrides in
 // allocator_shim/allocator_proxy.cc
 AllocateFunction g_alloc = NULL;
@@ -44,7 +44,7 @@ extern "C" {
 // Called from init_webrtc.cc.
 ALLOC_EXPORT
 bool InitializeModule(const CommandLine& command_line,
-#if !defined(OS_MACOSX)
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
                       AllocateFunction alloc,
                       DellocateFunction dealloc,
 #endif
@@ -53,7 +53,7 @@ bool InitializeModule(const CommandLine& command_line,
                       webrtc::AddTraceEventPtr trace_add_trace_event,
                       CreateWebRtcMediaEngineFunction* create_media_engine,
                       DestroyWebRtcMediaEngineFunction* destroy_media_engine) {
-#if !defined(OS_MACOSX)
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
   g_alloc = alloc;
   g_dealloc = dealloc;
 #endif