Make ViewRoot the top of the ViewAndroid tree

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 e4c3de2f19ed3e6e771db2b15dafb49048585158..9e1fe460ddfe78dce8ee6fa669c961b8fac55e62 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
@@ -58,7 +58,7 @@ 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;
 
@@ -306,8 +306,7 @@ 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()) {
@@ -315,7 +314,7 @@ public class CompositorViewHolder extends FrameLayout
         }
 
         mCompositorView.initNativeCompositor(
-                SysUtils.isLowEndDevice(), windowAndroid, mLayerTitleCache, tabContentManager);
+                SysUtils.isLowEndDevice(), viewRoot, mLayerTitleCache, tabContentManager);
 
         if (mLayerTitleCache != null) {
             mLayerTitleCache.setResourceManager(getResourceManager());