[Mac] Refactor bookmark pulsing into BookmarkBubbleObserverCocoa.

chrome/browser/ui/cocoa/bookmarks/bookmark_bubble_observer_cocoa.h

+// Copyright 2015 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.
+
+#ifndef CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BUBBLE_OBSERVER_COCOA_H_
+#define CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BUBBLE_OBSERVER_COCOA_H_
+
+#include "chrome/browser/ui/bookmarks/bookmark_bubble_observer.h"
+
+#import "base/mac/scoped_nsobject.h"
+
+@class BrowserWindowController;
+
+// Manages toolbar visibility locking and bookmark button pulsing.
+class BookmarkBubbleObserverCocoa : public bookmarks::BookmarkBubbleObserver {
+ public:
+  explicit BookmarkBubbleObserverCocoa(BrowserWindowController* controller);
+  ~BookmarkBubbleObserverCocoa() override;
+
+  // bookmarks::BookmarkBubbleObserver.
+  void OnBookmarkBubbleShown(const bookmarks::BookmarkNode* node) override;
+  void OnBookmarkBubbleHidden() override;
+
+ private:
+  BrowserWindowController* controller_;  // Weak, owns us.
+  base::scoped_nsobject<NSObject> lockOwner_;
+
+  DISALLOW_COPY_AND_ASSIGN(BookmarkBubbleObserverCocoa);
+};
+
+#endif  // CHROME_BROWSER_UI_COCOA_BOOKMARKS_BOOKMARK_BUBBLE_OBSERVER_COCOA_H_