Introduce ViewRoot forwarding input/view events to native

chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastWindowAndroid.java

Index: chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastWindowAndroid.java
diff --git a/chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastWindowAndroid.java b/chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastWindowAndroid.java
index 99b64bc5d6aa2886b4649dfbc3ccb1b1b9d581d0..087cf546d34c9c5c5900708f54c81acf714be39f 100644
--- a/chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastWindowAndroid.java
+++ b/chromecast/browser/android/apk/src/org/chromium/chromecast/shell/CastWindowAndroid.java
@@ -28,6 +28,7 @@ import org.chromium.content_public.browser.NavigationController;
 import org.chromium.content_public.browser.WebContents;
 import org.chromium.content_public.browser.WebContentsObserver;
 import org.chromium.ui.base.ViewAndroidDelegate;
+import org.chromium.ui.base.ViewRoot;
 import org.chromium.ui.base.WindowAndroid;
 
 /**
@@ -48,6 +49,7 @@ public class CastWindowAndroid extends LinearLayout {
     private WebContents mWebContents;
     private WebContentsObserver mWebContentsObserver;
     private WindowAndroid mWindow;
+    private ViewRoot mViewRoot;
 
     /**
      * Constructor for inflating via XML.
@@ -138,6 +140,8 @@ public class CastWindowAndroid extends LinearLayout {
         mContentViewCore.initialize(ViewAndroidDelegate.createBasicDelegate(view), view,
                 webContents, mWindow);
         mWebContents = mContentViewCore.getWebContents();
+        mViewRoot = ViewRoot.create(mWindow);
+        mWebContents.initViewRoot(mViewRoot);
         mNavigationController = mWebContents.getNavigationController();
         mRenderProcessId = renderProcessId;
 
@@ -147,7 +151,7 @@ public class CastWindowAndroid extends LinearLayout {
                         FrameLayout.LayoutParams.MATCH_PARENT,
                         FrameLayout.LayoutParams.MATCH_PARENT));
         view.requestFocus();
-        mContentViewRenderView.setCurrentContentViewCore(mContentViewCore);
+        mContentViewRenderView.setCurrentContent(mContentViewCore, mViewRoot);
 
         mWebContentsObserver = new WebContentsObserver(mWebContents) {
             @Override
@@ -168,6 +172,13 @@ public class CastWindowAndroid extends LinearLayout {
     }
 
     /**
+     * @return {@link ViewRoot} instance used to forward view/input events.
+     */
+    ViewRoot getViewRoot() {
+        return mViewRoot;
+    }
+
+    /**
      * @return The {@link ViewGroup} currently shown by this Shell.
      */
     public ViewGroup getContentView() {