Support Tab going into fullscreen

Change-Id: Iff65d9c56f3c38119712b01cdd18ce77f52e7337
diff --git a/src/com/android/browser/Tab.java b/src/com/android/browser/Tab.java
index c9e785f..ef9f468 100644
--- a/src/com/android/browser/Tab.java
+++ b/src/com/android/browser/Tab.java
@@ -746,6 +746,24 @@
         }
 
         @Override
+        public void toggleFullscreenModeForTab(boolean enterFullscreen) {
+            if (mWebViewController instanceof Controller) {
+                Controller controller = (Controller)mWebViewController;
+                controller.getUi().setTabFullscreen(enterFullscreen);
+            }
+        }
+
+        @Override
+        public boolean isTabFullScreen() {
+            if (mWebViewController instanceof Controller) {
+                Controller controller = (Controller)mWebViewController;
+                return controller.getUi().isTabFullScreen();
+            } else {
+                return false;
+            }
+        }
+
+        @Override
         public boolean onCreateWindow(WebView view, final boolean dialog,
                 final boolean userGesture, final Message resultMsg) {
             // only allow new window or sub window for the foreground case