hide webview when covered

     http://b/issue?id=3360921

Change-Id: I10e0df39fa5b686619bafd3708a249890326a259
diff --git a/src/com/android/browser/BaseUi.java b/src/com/android/browser/BaseUi.java
index 5ccfdda..98fc349 100644
--- a/src/com/android/browser/BaseUi.java
+++ b/src/com/android/browser/BaseUi.java
@@ -430,7 +430,9 @@
                         CombinedBookmarkHistoryView.FRAGMENT_ID_HISTORY
                         : CombinedBookmarkHistoryView.FRAGMENT_ID_BOOKMARKS,
                 extras);
-        getEmbeddedTitleBar().setVisibility(View.GONE);
+        FrameLayout wrapper =
+            (FrameLayout) mContentView.findViewById(R.id.webview_wrapper);
+        wrapper.setVisibility(View.GONE);
         hideFakeTitleBar();
         dismissIME();
         if (mActiveTab != null) {
@@ -447,7 +449,9 @@
     public void hideComboView() {
         if (mComboView != null) {
             mContentView.removeView(mComboView);
-            getEmbeddedTitleBar().setVisibility(View.VISIBLE);
+            FrameLayout wrapper =
+                (FrameLayout) mContentView.findViewById(R.id.webview_wrapper);
+            wrapper.setVisibility(View.VISIBLE);
             mComboView = null;
         }
         if (mActiveTab != null) {