Use contents size for android_webview layout.

android_webview/java/src/org/chromium/android_webview/AwContents.java

Index: android_webview/java/src/org/chromium/android_webview/AwContents.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwContents.java b/android_webview/java/src/org/chromium/android_webview/AwContents.java
index cb91c77ae25656cf4af7011f34777fc99a0883c5..40a73063229febda21c317ad6095557fdccc6e43 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwContents.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwContents.java
@@ -490,8 +490,7 @@ public class AwContents {
         mDIPScale = DeviceDisplayInfo.create(containerView.getContext()).getDIPScale();
         mLayoutSizer.setDelegate(new AwLayoutSizerDelegate());
         mLayoutSizer.setDIPScale(mDIPScale);
-        mWebContentsDelegate = new AwWebContentsDelegateAdapter(contentsClient,
-                mLayoutSizer.getPreferredSizeChangedListener(), mContainerView);
+        mWebContentsDelegate = new AwWebContentsDelegateAdapter(contentsClient, mContainerView);
         mContentsClientBridge = new AwContentsClientBridge(contentsClient);
         mZoomControls = new AwZoomControls(this);
         mIoThreadClient = new IoThreadClientImpl();
@@ -1782,6 +1781,12 @@ public class AwContents {
     }
 
     @CalledByNative
+    private void onWebLayoutContentsSizeChanged(int widthCss, int heightCss) {
+        // This change notification comes from the renderer thread, not from the cc/ impl thread.
+        mLayoutSizer.onContentSizeChanged(widthCss, heightCss);
+    }
+
+    @CalledByNative
     private void scrollContainerViewTo(int x, int y) {
         mScrollOffsetManager.scrollContainerViewTo(x, y);
     }