Refactor Bookmark fragment, fixes NPE

 Bug: 2926451
 This change refactors the BrowserBookmarkPage fragment for better
 encapsulation, and updates the CombinedBookmarkHistoryView and
 ShortcutActivity. ShortcutActivity now supports folder navigation
 as well as toggling list or thumbnail view.

Change-Id: Ie8168467e793d60d75c15746f81318cfa7e9f003
diff --git a/res/layout/bookmarks_header.xml b/res/layout/bookmarks_header.xml
new file mode 100644
index 0000000..597e629
--- /dev/null
+++ b/res/layout/bookmarks_header.xml
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2010 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.
+-->
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="48dip"
+    android:orientation="horizontal">
+
+    <TextView
+        android:id="@+id/root_folder"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:text="@string/defaultBookmarksUpButton"
+        android:textAppearance="?android:attr/textAppearanceMedium"
+        android:gravity="center_vertical"
+        android:visibility="gone"
+        android:paddingLeft="16dip"
+        android:drawableLeft="@drawable/ic_tab_bookmarks_selected"
+        android:drawablePadding="16dip" />
+
+    <com.android.browser.BreadCrumbView
+        android:id="@+id/crumbs"
+        android:layout_width="0dip"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:paddingLeft="16dip" />
+
+    <TextView
+        android:id="@+id/select_bookmark_view"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:text="@string/switch_to_thumbnails"
+        android:textAppearance="?android:attr/textAppearanceMedium"
+        android:gravity="center_vertical" />
+
+</LinearLayout>