Add BubbleManager to manage bubbles and ChromeBubbleManager for events.

components/bubble/bubble_delegate.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 COMPONENTS_BUBBLE_BUBBLE_DELEGATE_H_
+#define COMPONENTS_BUBBLE_BUBBLE_DELEGATE_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+
+class BubbleUI;
+
+class BubbleDelegate : public base::SupportsWeakPtr<BubbleDelegate> {
+ public:
+  virtual ~BubbleDelegate() {}
+
+  // Build UI to represent this bubble.
+  virtual scoped_ptr<BubbleUI> BuildBubbleUI() = 0;
+
+  // Get the context for this bubble. This allows a bubble to be
+  // hidden/closed/shown on the correct events.
+  virtual void* GetContext() = 0;
+};
+
+#endif  // COMPONENTS_BUBBLE_BUBBLE_DELEGATE_H_