Introduce ViewRoot forwarding input/view events to native

content/shell/android/java/src/org/chromium/content_shell/Shell.java

Index: content/shell/android/java/src/org/chromium/content_shell/Shell.java
diff --git a/content/shell/android/java/src/org/chromium/content_shell/Shell.java b/content/shell/android/java/src/org/chromium/content_shell/Shell.java
index e2f82e34584bb68430d33a6a1396760ae116293b..4a8bbaaee7564f2f797e52f2b9ece6be48563044 100644
--- a/content/shell/android/java/src/org/chromium/content_shell/Shell.java
+++ b/content/shell/android/java/src/org/chromium/content_shell/Shell.java
@@ -37,6 +37,7 @@ import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.content_public.browser.NavigationController;
 import org.chromium.content_public.browser.WebContents;
 import org.chromium.ui.base.ViewAndroidDelegate;
+import org.chromium.ui.base.ViewRoot;
 import org.chromium.ui.base.WindowAndroid;
 
 /**
@@ -68,6 +69,7 @@ public class Shell extends LinearLayout {
     private long mNativeShell;
     private ContentViewRenderView mContentViewRenderView;
     private WindowAndroid mWindow;
+    private ViewRoot mViewRoot;
 
     private boolean mLoading;
     private boolean mIsFullscreen;
@@ -125,6 +127,7 @@ public class Shell extends LinearLayout {
         mWindow = null;
         mNativeShell = 0;
         mContentViewCore.destroy();
+        mViewRoot.destroy();
     }
 
     /**
@@ -297,7 +300,7 @@ public class Shell extends LinearLayout {
         mContentViewCore = new ContentViewCore(context, "");
         ContentView cv = ContentView.createContentView(context, mContentViewCore);
         mContentViewCore.initialize(ViewAndroidDelegate.createBasicDelegate(cv), cv,
-                webContents, mWindow);
+                webContents, ViewRoot.create(mWindow));
         mContentViewCore.setActionModeCallback(defaultActionCallback());
         mContentViewCore.setContentViewClient(mContentViewClient);
         mWebContents = mContentViewCore.getWebContents();