Add BubbleManager to manage bubbles and ChromeBubbleManager for events.

components/bubble/bubble_delegate.h

Index: components/bubble/bubble_delegate.h
diff --git a/components/bubble/bubble_delegate.h b/components/bubble/bubble_delegate.h
new file mode 100644
index 0000000000000000000000000000000000000000..8987d0645a5ec9e1d943295cdaff02eeb34636d0
--- /dev/null
+++ b/components/bubble/bubble_delegate.h
@@ -0,0 +1,37 @@
+// 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"
+
+class BubbleUI;
+
+class BubbleDelegate {

[msw, 2015/08/13 03:37:22]

nit: explanatory class comment for the ignorant; what's this for?

[hcarmona, 2015/08/15 02:03:19]

Done.

+ public:
+  BubbleDelegate();
+  virtual ~BubbleDelegate();
+
+  // Called to notify the delegate that it is closed.

[msw, 2015/08/13 03:37:22]

nit: "Called by the BubbleController to"...

[hcarmona, 2015/08/15 02:03:20]

Done.

+  // This is different than hiding the bubble because the delegate will be
+  // cleaned up after this call.
+  virtual void DidClose() = 0;

[msw, 2015/08/13 03:37:22]

The controller owns the delegate, right? so why can't it just destroy it
outright? Then delegate subclasses can just put their teardown logic in the dtor
and this callback isn't needed. That seems more straightforward.

[hcarmona, 2015/08/15 02:03:20]

Done.

+
+  // Returning true here means that the bubble will not be shown again after it
+  // is hidden.
+  virtual bool ShouldCloseOnHide() const = 0;

[msw, 2015/08/13 03:37:22]

nit: ShouldDestroyOnHide here and elsewhere?

[hcarmona, 2015/08/15 02:03:20]

Acknowledged.

+
+  // Build UI to represent this bubble.
+  virtual scoped_ptr<BubbleUI> BuildBubbleUI() = 0;
+
+  // Get the context for this bubble. This allows a bubble to be

[msw, 2015/08/13 03:37:22]

nit: explain what the context is, maybe give an example?

[hcarmona, 2015/08/15 02:03:20]

Acknowledged.

+  // hidden/closed/shown on the correct events.
+  virtual void* GetContext() const = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BubbleDelegate);
+};
+
+#endif  // COMPONENTS_BUBBLE_BUBBLE_DELEGATE_H_