Add BubbleManager to manage bubbles and ChromeBubbleManager for events.

chrome/browser/ui/chrome_bubble_manager.h

Index: chrome/browser/ui/chrome_bubble_manager.h
diff --git a/chrome/browser/ui/chrome_bubble_manager.h b/chrome/browser/ui/chrome_bubble_manager.h
new file mode 100644
index 0000000000000000000000000000000000000000..fa752219d8ad884366972e59f6c870bc7d4fb732
--- /dev/null
+++ b/chrome/browser/ui/chrome_bubble_manager.h
@@ -0,0 +1,29 @@
+// 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 CHROME_BROWSER_UI_CHROME_BUBBLE_MANAGER_H_
+#define CHROME_BROWSER_UI_CHROME_BUBBLE_MANAGER_H_
+
+#include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
+#include "components/bubble/bubble_manager.h"
+
+class ChromeBubbleManager : public BubbleManager,
+                            public TabStripModelObserver,
+                            public base::SupportsWeakPtr<ChromeBubbleManager> {

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

Remove this if it's unused; nothing calls AsWeakPtr on a manager, afaict.
(otherwise, include the weak_ptr header if it's really needed)

[hcarmona, 2015/08/26 17:25:58]

Done.

+ public:
+  ChromeBubbleManager();
+  ~ChromeBubbleManager() override;
+
+  // TabStripModelObserver:
+  void TabDetachedAt(content::WebContents* contents, int index) override;
+  void TabDeactivated(content::WebContents* contents) override;
+
+  void WindowFullscreenStateChanged();

[msw, 2015/08/26 01:42:36]

Do this with a WebContentsObserver::DidToggleFullscreenModeForTab override and
remove the last remaining observer hook in browser.cc (and the fullscreen call
in Cocoa's moveViewsForImmersiveFullscreen).

[hcarmona, 2015/08/26 17:25:58]

Done.

+  void NavigationEntryCommitted();

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

When is this ever called? Should this be a WebContentsObserver override?

[hcarmona, 2015/08/26 17:25:58]

Done.

+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ChromeBubbleManager);
+};
+
+#endif  // CHROME_BROWSER_UI_CHROME_BUBBLE_MANAGER_H_