Add BubbleManager to manage bubbles and ChromeBubbleManager for events.

components/bubble/bubble_delegate.cc

 // 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.
 
-#include "malloc_wrapper.h"
+#include "components/bubble/bubble_delegate.h"
 
-#include <stdlib.h>
+BubbleDelegate::BubbleDelegate() : weak_ptr_factory(this) {}
 
-void* MallocWrapper(size_t size) {
-  return malloc(size);
-}
+BubbleDelegate::~BubbleDelegate() {}