Auto hide URL bar.

- Implement URLbar hide on onOffsetsForFullscreenChanged
  notiication from the engine.

  -Reverted
   "Fix for disappearing title bar caused by copy/paste control"
   Change-Id: I19860bd9356b2dc392539aa1e16819545e32de6d"

Change-Id: Ie8547e9a7ca7dfc892a94c5632a7fddddef58cc3
diff --git a/src/com/android/browser/Tab.java b/src/com/android/browser/Tab.java
index 2b91c96..d0a27b9 100644
--- a/src/com/android/browser/Tab.java
+++ b/src/com/android/browser/Tab.java
@@ -754,6 +754,18 @@
         }
 
         @Override
+        public void onOffsetsForFullscreenChanged(
+            float topControlsOffsetYPix, float contentOffsetYPix, float overdrawBottomHeightPix) {
+            boolean hide_title_on_scroll =
+                mContext.getResources().getBoolean(R.bool.hide_title_on_scroll);
+            if (mWebViewController instanceof Controller && hide_title_on_scroll) {
+                Controller controller = (Controller)mWebViewController;
+                mMainView.setTranslationY(contentOffsetYPix);
+                controller.getUi().transalateTitleBar(topControlsOffsetYPix);
+            }
+        }
+
+        @Override
         public boolean isTabFullScreen() {
             if (mWebViewController instanceof Controller) {
                 Controller controller = (Controller)mWebViewController;