Updates for the look of the bookmarks page.

Add new assets.

-tab_indicator.xml
State selector for the background of tabs in the CombinedHistoryActivity

-bookmark_thumnail.xml
Web page title is now above the thumb.  Removed the favicon.  Added a
shadow.

-tab_header.xml
Layout for the tabs in CombinedHistoryActivity

-tabs.xml
Change the height of the tabs.

-bookmarks.xml
Remove the title for the "switch" menu item, which gets set in Java,
depending on the current viewing mode.

-strings.xml
Remove the placeholder menu item text, add the actual text for
switching between modes.

-BrowserBookmarksAdapter
No longer set the favicon on top of the bookmark thumbs in grid mode.

-BrowserBookmarksPage
Implement onPrepareOptionsMenu, and set the title of a menu option,
depending on the current viewing state.

-CombinedHistoryActivity
Create a common function for setting up all the tabs.  Change the
look of the tabs to match the new design.
diff --git a/res/layout/tab_header.xml b/res/layout/tab_header.xml
new file mode 100644
index 0000000..7187034
--- /dev/null
+++ b/res/layout/tab_header.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2009 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<FrameLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="fill_parent"
+    android:layout_height="wrap_content"
+    android:background="@drawable/tab_indicator"
+    >
+    <TextView
+        android:id="@+id/tab_label"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textColor="?android:attr/textColorPrimary"
+        android:layout_gravity="center"
+        />
+</FrameLayout>