Add EventForwarder for routing touch events

content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java

Index: content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java b/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
index 13aa756e8f9ed9dce4105cc23f939de6f1463569..95c35754313e37a5cce35863706ad2239e079f0e 100644
--- a/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
+++ b/content/public/android/java/src/org/chromium/content/browser/webcontents/WebContentsImpl.java
@@ -32,6 +32,7 @@ import org.chromium.content_public.browser.WebContents;
 import org.chromium.content_public.browser.WebContentsObserver;
 import org.chromium.ui.OverscrollRefreshHandler;
 import org.chromium.ui.accessibility.AXTextStyle;
+import org.chromium.ui.base.EventHandler;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -103,6 +104,8 @@ import java.util.UUID;
 
     private SmartClipCallback mSmartClipCallback;
 
+    private EventHandler mEventHandler;
+
     private WebContentsImpl(
             long nativeWebContentsAndroid, NavigationController navigationController) {
         mNativeWebContentsAndroid = nativeWebContentsAndroid;
@@ -464,6 +467,15 @@ import java.util.UUID;
     }
 
     @Override
+    public EventHandler getEventHandler() {
+        assert mNativeWebContentsAndroid != 0;
+        if (mEventHandler == null) {
+            mEventHandler = nativeCreateEventHandler(mNativeWebContentsAndroid);
+        }
+        return mEventHandler;
+    }
+
+    @Override
     public void addObserver(WebContentsObserver observer) {
         assert mNativeWebContentsAndroid != 0;
         if (mObserverProxy == null) mObserverProxy = new WebContentsObserverProxy(this);
@@ -616,4 +628,5 @@ import java.util.UUID;
     private native void nativeDismissTextHandles(long nativeWebContentsAndroid);
     private native void nativeSetHasPersistentVideo(long nativeWebContentsAndroid, boolean value);
     private native boolean nativeHasActiveEffectivelyFullscreenVideo(long nativeWebContentsAndroid);
+    private native EventHandler nativeCreateEventHandler(long nativeWebContentsAndroid);
 }