add fullscreen option

Change-Id: I88299c37a7e809492f806478f41365b56b2687be
diff --git a/src/com/android/browser/BaseUi.java b/src/com/android/browser/BaseUi.java
index 5bb4c1f..e2e313e 100644
--- a/src/com/android/browser/BaseUi.java
+++ b/src/com/android/browser/BaseUi.java
@@ -116,6 +116,7 @@
         mCustomViewContainer = (FrameLayout) mBrowserFrameLayout
                 .findViewById(R.id.fullscreen_custom_content);
         frameLayout.addView(mBrowserFrameLayout, COVER_SCREEN_PARAMS);
+        setFullscreen(BrowserSettings.getInstance().useFullscreen());
     }
 
     @Override
@@ -783,4 +784,15 @@
         return menu;
     }
 
+    public void setFullscreen(boolean enabled) {
+        if (enabled) {
+            mActivity.getWindow().setFlags(
+                    WindowManager.LayoutParams.FLAG_FULLSCREEN,
+                    WindowManager.LayoutParams.FLAG_FULLSCREEN);
+        } else {
+            mActivity.getWindow().clearFlags(
+                    WindowManager.LayoutParams.FLAG_FULLSCREEN);
+        }
+    }
+
 }