Add BubbleManager to manage bubbles and ChromeBubbleManager for events.

components/bubble/bubble_controller.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_CONTROLLER_H_
+#define COMPONENTS_BUBBLE_BUBBLE_CONTROLLER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "components/bubble/bubble_delegate.h"
+
+class BubbleUI;
+
+// BubbleController is responsible for the lifetime of the delegate and its UI.
+class BubbleController : public base::SupportsWeakPtr<BubbleController> {

[msw, 2015/08/21 01:48:30]

If users hold WeakPtrs to BubbleControllers, they'll also need to keep (weak)
pointers to the BubbleManager (or the Browser), otherwise they can't do anything
with the reference. Perhaps BubbleController should have a member pointing to
the manager for convenience, or (for even more user convenience) perhaps the
controller should have public versions of show/update/close that calls through
to its bubble manager.

These are just optional ideas to make BubbleReferences more self-contained for
users. It's not critical yet, but worth considering as existing bubbles start
using the new component.

[hcarmona, 2015/08/25 02:13:36]

I added |CloseBubble| so it can be called on the bubble reference, but I
don't think we want to add |CloseAllBubbles| or |UpdateAllBubbleAnchors|
to a single bubble reference.

[msw, 2015/08/26 01:42:35]

Acknowledged.

+ public:
+  explicit BubbleController(scoped_ptr<BubbleDelegate> delegate);
+  virtual ~BubbleController();
+
+ private:
+  friend class BubbleManager;
+
+  // Will create and show the UI for the delegate.
+  void Show();
+
+  // Will notify the bubble UI that it should update its anchor location.
+  // Important when there's a UI change (ex: fullscreen transition).
+  void UpdateAnchorPosition();
+
+  // Will clean up the delegate and its UI if it closed.
+  // Returns true if the bubble was closed.
+  bool ShouldClose(BubbleCloseReason reason);
+
+  scoped_ptr<BubbleDelegate> delegate_;
+  scoped_ptr<BubbleUI> bubble_ui_;
+
+  DISALLOW_COPY_AND_ASSIGN(BubbleController);
+};
+
+#endif  // COMPONENTS_BUBBLE_BUBBLE_CONTROLLER_H_