Add BookmarkUndoService to Android build

chrome/android/java/src/org/chromium/chrome/browser/BookmarksBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/BookmarksBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/BookmarksBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/BookmarksBridge.java
index 6a79fa53e79914749a5a5889d7846b479befde4f..2426b65aa737c84e24ad4347bfa132b63fda57e7 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/BookmarksBridge.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/BookmarksBridge.java
@@ -451,6 +451,27 @@ public class BookmarksBridge {
     }
 
     /**
+     * Undo the last undoable action on the top of the bookmark undo stack
+     */
+    public void undo() {
+        nativeUndo(mNativeBookmarksBridge);
+    }
+
+    /**
+     * Start grouping actions for a single undo operation
+     */
+    public void undoStartGrouping() {

[Ian Wen, 2014/09/21 01:25:38]

This name is a bit confusing as it implies we are trying to undo a grouping
action. Maybe we should rename it as startUndoGrouping(), and same below.

+        nativeUndoStartGrouping(mNativeBookmarksBridge);
+    }
+
+    /**
+     * End grouping actions for a single undo operation
+     */
+    public void undoEndGrouping() {
+        nativeUndoEndGrouping(mNativeBookmarksBridge);
+    }
+
+    /**
      * A bridge function to BookmarkModelFactory::GetForProfile.
      */
     public static long getNativeBookmarkModel(Profile profile) {
@@ -618,9 +639,13 @@ public class BookmarksBridge {
             BookmarkId newParentId, int index);
     private native BookmarkId nativeAddBookmark(long nativeBookmarksBridge, BookmarkId parent,
             int index, String title, String url);
+    private native void nativeUndo(long nativeBookmarksBridge);
+    private native void nativeUndoStartGrouping(long nativeBookmarksBridge);
+    private native void nativeUndoEndGrouping(long nativeBookmarksBridge);
     private static native long nativeGetNativeBookmarkModel(Profile profile);
     private static native boolean nativeIsEnhancedBookmarksFeatureEnabled(Profile profile);
     private native void nativeLoadEmptyPartnerBookmarkShimForTesting(long nativeBookmarksBridge);
+
     private native long nativeInit(Profile profile);
     private native boolean nativeIsDoingExtensiveChanges(long nativeBookmarksBridge);
     private native void nativeDestroy(long nativeBookmarksBridge);