Add BubbleManager to manage bubbles and ChromeBubbleManager for events.

components/bubble/bubble_delegate.cc

Index: components/bubble/bubble_delegate.cc
diff --git a/base/test/malloc_wrapper.cc b/components/bubble/bubble_delegate.cc
similarity index 53%
copy from base/test/malloc_wrapper.cc
copy to components/bubble/bubble_delegate.cc
index eb280a3eeea52f49e534c7c5e3f6f7a40e80a750..24df98a803526862077c5b8ea659eea0771113b2 100644
--- a/base/test/malloc_wrapper.cc
+++ b/components/bubble/bubble_delegate.cc
@@ -2,10 +2,8 @@
 // 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() {}