Do not show permission bubble when browser is not active

chrome/browser/ui/views/frame/browser_view.h

 // Copyright (c) 2012 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_VIEWS_FRAME_BROWSER_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_VIEW_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 403 matching lines @@
   views::View* GetContentsView() override;
   views::ClientView* CreateClientView(views::Widget* widget) override;
   void OnWindowBeginUserBoundsChange() override;
   void OnWidgetMove() override;
   views::Widget* GetWidget() override;
   const views::Widget* GetWidget() const override;
   void GetAccessiblePanes(std::vector<View*>* panes) override;
 
   // Overridden from views::WidgetObserver:
   void OnWidgetDestroying(views::Widget* widget) override;
+  void OnWidgetVisibilityChanged(views::Widget* widget, bool visible) override;
   void OnWidgetActivationChanged(views::Widget* widget, bool active) override;
 
   // Overridden from views::ClientView:
   bool CanClose() override;
   int NonClientHitTest(const gfx::Point& point) override;
   gfx::Size GetMinimumSize() const override;
 
   // InfoBarContainerDelegate:
   SkColor GetInfoBarSeparatorColor() const override;
   void InfoBarContainerStateChanged(bool is_animating) override;
@@ skipping 280 matching lines @@
   // The class that registers for keyboard shortcuts for extension commands.
   std::unique_ptr<ExtensionKeybindingRegistryViews>
       extension_keybinding_registry_;
 
   mutable base::WeakPtrFactory<BrowserView> activate_modal_dialog_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_VIEW_H_