[Mac] On pressing Esc key, close Bookmark Bubble without editing.

chrome/browser/ui/cocoa/bookmarks/bookmark_bubble_controller.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bubble_controller.h"
 
 #include "base/mac/bundle_locations.h"
 #include "base/mac/mac_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/browser/bookmarks/chrome_bookmark_client.h"
@@ skipping 232 matching lines @@
 }
 
 // By implementing this, ESC causes the window to go away. If clicking the
 // star was what prompted this bubble to appear (i.e., not already bookmarked),
 // remove the bookmark.
 - (IBAction)cancel:(id)sender {
   if (!alreadyBookmarked_) {
     // |-remove:| calls |-close| so don't do it.
     [self remove:sender];
   } else {
-    [self ok:sender];
+    [self stopPulsingBookmarkButton];
+    [self dismissWithoutEditing:nil];
   }
 }
 
 - (IBAction)remove:(id)sender {
   [self stopPulsingBookmarkButton];
   bookmarks::RemoveAllBookmarks(model_, node_->url());
   content::RecordAction(UserMetricsAction("BookmarkBubble_Unstar"));
   node_ = NULL;  // no longer valid
   [self ok:sender];
 }
@@ skipping 136 matching lines @@
   NSInteger idx = [menu indexOfItemWithRepresentedObject:parentValue];
   DCHECK(idx != -1);
   [folderPopUpButton_ selectItemAtIndex:idx];
 }
 
 - (NSPopUpButton*)folderPopUpButton {
   return folderPopUpButton_;
 }
 
 @end  // implementation BookmarkBubbleController(ExposedForUnitTesting)