Enable gesture events handling on Android.

content/public/android/java/src/org/chromium/content/browser/ContentView.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentView.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentView.java b/content/public/android/java/src/org/chromium/content/browser/ContentView.java
index e99a348c1c9000dca3f2f303c159c22d4631f683..fe7b3322c8d432de46a7e2e0e1765a938a96b778 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentView.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentView.java
@@ -287,18 +287,18 @@ public class ContentView extends FrameLayout implements ContentViewCore.Internal
      * Start pinch zoom. You must call {@link #pinchEnd} to stop.
      */
     void pinchBegin(long timeMs, int x, int y) {
-        mContentViewCore.pinchBegin(timeMs, x, y);
+        mContentViewCore.getContentViewGestureHandler().pinchBegin(timeMs, x, y);
     }
 
     /**
      * Stop pinch zoom.
      */
     void pinchEnd(long timeMs) {
-        mContentViewCore.pinchEnd(timeMs);
+        mContentViewCore.getContentViewGestureHandler().pinchEnd(timeMs);
     }
 
     void setIgnoreSingleTap(boolean value) {
-        mContentViewCore.setIgnoreSingleTap(value);
+        mContentViewCore.getContentViewGestureHandler().setIgnoreSingleTap(value);
     }
 
     /**
@@ -314,7 +314,7 @@ public class ContentView extends FrameLayout implements ContentViewCore.Internal
      *            coordinate.
      */
     void pinchBy(long timeMs, int anchorX, int anchorY, float delta) {
-        mContentViewCore.pinchBy(timeMs, anchorX, anchorY, delta);
+        mContentViewCore.getContentViewGestureHandler().pinchBy(timeMs, anchorX, anchorY, delta);
     }
 
     /**
@@ -345,6 +345,10 @@ public class ContentView extends FrameLayout implements ContentViewCore.Internal
         super.onScrollChanged(l, t, oldl, oldt);
     }
 
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        return mContentViewCore.onTouchEvent(event);
+    }
     // End FrameLayout overrides.
 
     @Override