Pass TouchMajor to HitTestResult

Blink side change to do hit-test that mimics GestureTap:
https://codereview.chromium.org/470833002

Without the touch major information, HitTestResult may not
match how touch events are handled in content view core. As
a result, it is possible that the user touches a link while
the hitTestResult returns unknown type.

BUG=403865

Review URL: https://codereview.chromium.org/475633002

Cr-Commit-Position: refs/heads/master@{#304067}

android_webview/browser/renderer_host/aw_render_view_host_ext.cc

@@ -57,11 +57,12 @@ void AwRenderViewHostExt::MarkHitTestDataRead() {
   has_new_hit_test_data_ = false;
 }
 
-void AwRenderViewHostExt::RequestNewHitTestDataAt(int view_x, int view_y) {
+void AwRenderViewHostExt::RequestNewHitTestDataAt(
+    const gfx::PointF& touch_center,
+    const gfx::SizeF& touch_area) {
   DCHECK(CalledOnValidThread());
-  Send(new AwViewMsg_DoHitTest(web_contents()->GetRoutingID(),
-                               view_x,
-                               view_y));
+  Send(new AwViewMsg_DoHitTest(web_contents()->GetRoutingID(), touch_center,
+                               touch_area));
 }
 
 const AwHitTestData& AwRenderViewHostExt::GetLastHitTestData() const {

android_webview/browser/renderer_host/aw_render_view_host_ext.h

@@ -11,6 +11,8 @@
 #include "base/callback_forward.h"
 #include "base/threading/non_thread_safe.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "ui/gfx/geometry/point_f.h"
+#include "ui/gfx/geometry/size_f.h"
 #include "ui/gfx/size.h"
 
 class GURL;
@@ -53,9 +55,10 @@ class AwRenderViewHostExt : public content::WebContentsObserver,
   void ClearCache();
 
   // Do a hit test at the view port coordinates and asynchronously update
-  // |last_hit_test_data_|. |view_x| and |view_y| are in density independent
-  // pixels used by blink::WebView.
-  void RequestNewHitTestDataAt(int view_x, int view_y);
+  // |last_hit_test_data_|. Width and height in |touch_area| are in density
+  // independent pixels used by blink::WebView.
+  void RequestNewHitTestDataAt(const gfx::PointF& touch_center,
+                               const gfx::SizeF& touch_area);
 
   // Optimization to avoid unnecessary Java object creation on hit test.
   bool HasNewHitTestData() const;

android_webview/common/render_view_messages.h

@@ -9,6 +9,8 @@
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_platform_file.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "ui/gfx/geometry/point_f.h"
+#include "ui/gfx/geometry/size_f.h"
 
 // Singly-included section for enums and custom IPC traits.
 #ifndef ANDROID_WEBVIEW_COMMON_RENDER_VIEW_MESSAGES_H_
@@ -49,8 +51,8 @@ IPC_MESSAGE_ROUTED1(AwViewMsg_DocumentHasImages,
 // physical pixel values with the 0,0 at the top left of the current displayed
 // view (ie 0,0 is not the top left of the page if the page is scrolled).
 IPC_MESSAGE_ROUTED2(AwViewMsg_DoHitTest,
-                    int /* view_x */,
-                    int /* view_y */)
+                    gfx::PointF /* touch_center */,
+                    gfx::SizeF /* touch_area */)
 
 // Sets the zoom factor for text only. Used in layout modes other than
 // Text Autosizing.

android_webview/java/src/org/chromium/android_webview/AwContents.java

@@ -2383,13 +2383,12 @@ public boolean onTouchEvent(MotionEvent event) {
             mScrollOffsetManager.setProcessingTouchEvent(false);
 
             if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
-                int actionIndex = event.getActionIndex();
-
                 // Note this will trigger IPC back to browser even if nothing is
                 // hit.
                 nativeRequestNewHitTestDataAt(mNativeAwContents,
-                        (int) Math.round(event.getX(actionIndex) / mDIPScale),
-                        (int) Math.round(event.getY(actionIndex) / mDIPScale));
+                        event.getX() / (float) mDIPScale,
+                        event.getY() / (float) mDIPScale,
+                        event.getTouchMajor() / (float) mDIPScale);
             }
 
             if (mOverScrollGlow != null) {
@@ -2603,7 +2602,8 @@ private native boolean nativeOnDraw(long nativeAwContents, Canvas canvas,
     private native byte[] nativeGetCertificate(long nativeAwContents);
 
     // Coordinates in desity independent pixels.
-    private native void nativeRequestNewHitTestDataAt(long nativeAwContents, int x, int y);
+    private native void nativeRequestNewHitTestDataAt(long nativeAwContents, float x, float y,
+            float touchMajor);
     private native void nativeUpdateLastHitTestData(long nativeAwContents);
 
     private native void nativeOnSizeChanged(long nativeAwContents, int w, int h, int ow, int oh);

android_webview/native/aw_contents.cc

@@ -66,6 +66,7 @@
 #include "net/cert/x509_certificate.h"
 #include "third_party/skia/include/core/SkPicture.h"
 #include "ui/gfx/android/java_bitmap.h"
+#include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/size.h"
 
@@ -724,10 +725,15 @@ base::android::ScopedJavaLocalRef<jbyteArray>
       reinterpret_cast<const uint8*>(der_string.data()), der_string.length());
 }
 
-void AwContents::RequestNewHitTestDataAt(JNIEnv* env, jobject obj,
-                                         jint x, jint y) {
+void AwContents::RequestNewHitTestDataAt(JNIEnv* env,
+                                         jobject obj,
+                                         jfloat x,
+                                         jfloat y,
+                                         jfloat touch_major) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  render_view_host_ext_->RequestNewHitTestDataAt(x, y);
+  gfx::PointF touch_center(x, y);
+  gfx::SizeF touch_area(touch_major, touch_major);
+  render_view_host_ext_->RequestNewHitTestDataAt(touch_center, touch_area);
 }
 
 void AwContents::UpdateLastHitTestData(JNIEnv* env, jobject obj) {

android_webview/native/aw_contents.h

@@ -97,7 +97,11 @@ class AwContents : public FindHelper::Listener,
   void AddVisitedLinks(JNIEnv* env, jobject obj, jobjectArray jvisited_links);
   base::android::ScopedJavaLocalRef<jbyteArray> GetCertificate(
       JNIEnv* env, jobject obj);
-  void RequestNewHitTestDataAt(JNIEnv* env, jobject obj, jint x, jint y);
+  void RequestNewHitTestDataAt(JNIEnv* env,
+                               jobject obj,
+                               jfloat x,
+                               jfloat y,
+                               jfloat touch_major);
   void UpdateLastHitTestData(JNIEnv* env, jobject obj);
   void OnSizeChanged(JNIEnv* env, jobject obj, int w, int h, int ow, int oh);
   void SetViewVisibility(JNIEnv* env, jobject obj, bool visible);

android_webview/renderer/aw_render_view_ext.cc

@@ -265,13 +265,15 @@ void AwRenderViewExt::FocusedNodeChanged(const blink::WebNode& node) {
   Send(new AwViewHostMsg_UpdateHitTestData(routing_id(), data));
 }
 
-void AwRenderViewExt::OnDoHitTest(int view_x, int view_y) {
+void AwRenderViewExt::OnDoHitTest(const gfx::PointF& touch_center,
+                                  const gfx::SizeF& touch_area) {
   if (!render_view() || !render_view()->GetWebView())
     return;
 
   const blink::WebHitTestResult result =
-      render_view()->GetWebView()->hitTestResultAt(
-          blink::WebPoint(view_x, view_y));
+      render_view()->GetWebView()->hitTestResultForTap(
+          blink::WebPoint(touch_center.x(), touch_center.y()),
+          blink::WebSize(touch_area.width(), touch_area.height()));
   AwHitTestData data;
 
   if (!result.urlElement().isNull()) {

android_webview/renderer/aw_render_view_ext.h

@@ -10,6 +10,8 @@
 #include "base/timer/timer.h"
 #include "content/public/renderer/render_view_observer.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "ui/gfx/geometry/point_f.h"
+#include "ui/gfx/geometry/size_f.h"
 #include "ui/gfx/size.h"
 
 namespace blink {
@@ -41,7 +43,8 @@ class AwRenderViewExt : public content::RenderViewObserver {
 
   void OnDocumentHasImagesRequest(int id);
 
-  void OnDoHitTest(int view_x, int view_y);
+  void OnDoHitTest(const gfx::PointF& touch_center,
+                   const gfx::SizeF& touch_area);
 
   void OnSetTextZoomFactor(float zoom_factor);