Introduce ViewRoot to forward input/view events to native

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

Index: content/public/android/java/src/org/chromium/content/browser/ContentViewRenderView.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentViewRenderView.java b/content/public/android/java/src/org/chromium/content/browser/ContentViewRenderView.java
index 77211351fab7e2da8043bee0dc454cdc914814e5..80b3593f3b1d798dce4770b6e686a07776b7ebf5 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentViewRenderView.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentViewRenderView.java
@@ -15,6 +15,7 @@ import android.widget.FrameLayout;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
 import org.chromium.content_public.browser.WebContents;
+import org.chromium.ui.base.ViewRoot;
 import org.chromium.ui.base.WindowAndroid;
 
 /***
@@ -71,8 +72,7 @@ public class ContentViewRenderView extends FrameLayout {
                 nativeSurfaceChanged(mNativeContentViewRenderView,
                         format, width, height, holder.getSurface());
                 if (mContentViewCore != null) {
-                    mContentViewCore.onPhysicalBackingSizeChanged(
-                            width, height);
+                    getViewRoot().onPhysicalBackingSizeChanged(width, height);
                 }
             }
 
@@ -94,6 +94,10 @@ public class ContentViewRenderView extends FrameLayout {
         mSurfaceView.setVisibility(VISIBLE);
     }
 
+    private ViewRoot getViewRoot() {
+        return mContentViewCore.getWindowAndroid().getViewRoot();
+    }
+
     /**
      * Sets the background color of the surface view.  This method is necessary because the
      * background color of ContentViewRenderView itself is covered by the background of
@@ -128,7 +132,7 @@ public class ContentViewRenderView extends FrameLayout {
         mContentViewCore = contentViewCore;
 
         if (mContentViewCore != null) {
-            mContentViewCore.onPhysicalBackingSizeChanged(getWidth(), getHeight());
+            getViewRoot().onPhysicalBackingSizeChanged(getWidth(), getHeight());
             nativeSetCurrentWebContents(
                     mNativeContentViewRenderView, mContentViewCore.getWebContents());
         } else {