fix menu state after fullscreen video

    http://b/issue?id=3413957
    before leaving browser activity, hide custom view
    this also restores the menu state

Change-Id: Ie0859bc21b2821bb513eaea9ad3ea401b95dc177
diff --git a/src/com/android/browser/Controller.java b/src/com/android/browser/Controller.java
index a2ddc8c..07e1ef9 100644
--- a/src/com/android/browser/Controller.java
+++ b/src/com/android/browser/Controller.java
@@ -568,6 +568,9 @@
     }
 
     protected void onPause() {
+        if (mUi.isCustomViewShowing()) {
+            hideCustomView();
+        }
         if (mActivityPaused) {
             Log.e(LOGTAG, "BrowserActivity is already paused.");
             return;