[Mac] Refactor bookmark pulsing into BookmarkBubbleObserverCocoa.

chrome/browser/ui/cocoa/bookmarks/bookmark_button.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_button.h"
 
 #include <cmath>
 
 #include "base/logging.h"
 #include "base/mac/foundation_util.h"
 #import "base/mac/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_window.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_button_cell.h"
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 #import "chrome/browser/ui/cocoa/view_id_util.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "content/public/browser/user_metrics.h"
 #import "ui/base/cocoa/nsview_additions.h"
 #include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
 
 using base::UserMetricsAction;
 using bookmarks::BookmarkNode;
 
 // The opacity of the bookmark button drag image.
 static const CGFloat kDragImageOpacity = 0.7;
 
-namespace bookmark_button {
-
-NSString* const kPulseBookmarkButtonNotification =
-    @"PulseBookmarkButtonNotification";
-NSString* const kBookmarkKey = @"BookmarkKey";
-NSString* const kBookmarkPulseFlagKey = @"BookmarkPulseFlagKey";
-
-};
-
 namespace {
 // We need a class variable to track the current dragged button to enable
 // proper live animated dragging behavior, and can't do it in the
 // delegate/controller since you can drag a button from one domain to the
 // other (from a "folder" menu, to the main bar, or vice versa).
 BookmarkButton* gDraggedButton = nil; // Weak
 };
 
 @interface BookmarkButton(Private)
 
@@ skipping 430 matching lines @@
   [[cell clipPathForFrame:bounds inView:self] setClip];
   [cell drawWithFrame:bounds inView:self];
 
   CGContextEndTransparencyLayer(cgContext);
   [image unlockFocus];
 
   return image.autorelease();
 }
 
 @end  // @implementation BookmarkButton(Private)