Introduce ViewRoot to forward input/view events to native

chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
index 049f3a30cbef0a5d3fdb650b068f4ce895c22a4b..cba48cd427210a41f2e6e2fe95a76975c2789187 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
@@ -2435,7 +2435,8 @@ public class Tab implements ViewGroup.OnHierarchyChangeListener,
         // (see http://crbug.com/340987).
         newContentViewCore.onSizeChanged(originalWidth, originalHeight, 0, 0);
         if (!bounds.isEmpty()) {
-            newContentViewCore.onPhysicalBackingSizeChanged(bounds.right, bounds.bottom);
+            newContentViewCore.getViewDelegate().onPhysicalBackingSizeChanged(
+                    bounds.right, bounds.bottom);
         }
         newContentViewCore.onShow();
         setContentViewCore(newContentViewCore);