Introduce ViewRoot forwarding input/view events to native

chrome/android/java/src/org/chromium/chrome/browser/compositor/CompositorViewHolder.java

Index: chrome/android/java/src/org/chromium/chrome/browser/compositor/CompositorViewHolder.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/compositor/CompositorViewHolder.java b/chrome/android/java/src/org/chromium/chrome/browser/compositor/CompositorViewHolder.java
index 593dcc21fc9088298390485bc03d42a99b9b974d..cd859b8ede1da95bd108d60dc1ca485a2cfd3c98 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/compositor/CompositorViewHolder.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/compositor/CompositorViewHolder.java
@@ -57,7 +57,7 @@ import org.chromium.content.browser.ContentViewCore;
 import org.chromium.content.browser.SPenSupport;
 import org.chromium.ui.UiUtils;
 import org.chromium.ui.base.DeviceFormFactor;
-import org.chromium.ui.base.WindowAndroid;
+import org.chromium.ui.base.ViewRoot;
 import org.chromium.ui.resources.ResourceManager;
 import org.chromium.ui.resources.dynamics.DynamicResourceLoader;
 
@@ -293,8 +293,7 @@ public class CompositorViewHolder extends FrameLayout
     /**
      * This is called when the native library are ready.
      */
-    public void onNativeLibraryReady(
-            WindowAndroid windowAndroid, TabContentManager tabContentManager) {
+    public void onNativeLibraryReady(ViewRoot viewRoot, TabContentManager tabContentManager) {
         assert mLayerTitleCache == null : "Should be called once";
 
         if (DeviceClassManager.enableLayerDecorationCache()) {
@@ -302,7 +301,7 @@ public class CompositorViewHolder extends FrameLayout
         }
 
         mCompositorView.initNativeCompositor(
-                SysUtils.isLowEndDevice(), windowAndroid, mLayerTitleCache, tabContentManager);
+                SysUtils.isLowEndDevice(), viewRoot, mLayerTitleCache, tabContentManager);
 
         if (mLayerTitleCache != null) {
             mLayerTitleCache.setResourceManager(getResourceManager());
@@ -826,6 +825,7 @@ public class CompositorViewHolder extends FrameLayout
                 // Claim focus for the new view unless the user is currently using the URL bar.
                 if (mUrlBar == null || !mUrlBar.hasFocus()) mView.requestFocus();
             }
+            content.moveToFrontInViewHierarchy();
         } else {
             if (mView.getParent() == this) {
                 setFocusable(true);