Make sure bubbles in Views default to close before their RenderFrameHosts.

chrome/browser/ui/chrome_bubble_manager.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 CHROME_BROWSER_UI_CHROME_BUBBLE_MANAGER_H_
 #define CHROME_BROWSER_UI_CHROME_BUBBLE_MANAGER_H_
 
 #include "base/macros.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 #include "components/bubble/bubble_manager.h"
@@ skipping 10 matching lines @@
 
   // TabStripModelObserver:
   void TabDetachedAt(content::WebContents* contents, int index) override;
   void TabDeactivated(content::WebContents* contents) override;
   void ActiveTabChanged(content::WebContents* old_contents,
                         content::WebContents* new_contents,
                         int index,
                         int reason) override;
 
   // content::WebContentsObserver:
+  void FrameDeleted(content::RenderFrameHost* render_frame_host) override;
   void DidToggleFullscreenModeForTab(bool entered_fullscreen,
                                      bool will_cause_resize) override;
   void NavigationEntryCommitted(
       const content::LoadCommittedDetails& load_details) override;
 
  private:
   class ChromeBubbleMetrics : public BubbleManager::BubbleManagerObserver {
    public:
     ChromeBubbleMetrics() {}
     ~ChromeBubbleMetrics() override {}
 
     // BubbleManager::BubbleManagerObserver:
     void OnBubbleNeverShown(BubbleReference bubble) override;
     void OnBubbleClosed(BubbleReference bubble,
                         BubbleCloseReason reason) override;
 
    private:
     DISALLOW_COPY_AND_ASSIGN(ChromeBubbleMetrics);
   };
 
   TabStripModel* tab_strip_model_;
   ChromeBubbleMetrics chrome_bubble_metrics_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeBubbleManager);
 };
 
 #endif  // CHROME_BROWSER_UI_CHROME_BUBBLE_MANAGER_H_