Ensure app install is aborted when the install dialog is closed

chrome/browser/ui/views/extensions/extension_install_dialog_view.h

Index: chrome/browser/ui/views/extensions/extension_install_dialog_view.h
diff --git a/chrome/browser/ui/views/extensions/extension_install_dialog_view.h b/chrome/browser/ui/views/extensions/extension_install_dialog_view.h
index 604e9ae1e6a874f6398f10cf122b2137550e71d7..4c8a6273586856f571da9188ab5c4aae65897b92 100644
--- a/chrome/browser/ui/views/extensions/extension_install_dialog_view.h
+++ b/chrome/browser/ui/views/extensions/extension_install_dialog_view.h
@@ -69,6 +69,7 @@ class ExtensionInstallDialogView : public views::DialogDelegateView,
   virtual int GetDefaultDialogButton() const OVERRIDE;
   virtual bool Cancel() OVERRIDE;
   virtual bool Accept() OVERRIDE;
+  virtual void OnClosed() OVERRIDE;
   virtual ui::ModalType GetModalType() const OVERRIDE;
   virtual base::string16 GetWindowTitle() const OVERRIDE;
   virtual void Layout() OVERRIDE;
@@ -112,6 +113,10 @@ class ExtensionInstallDialogView : public views::DialogDelegateView,
   // "Show permissions" links were shown and/or clicked.
   void UpdateLinkActionHistogram(int action_type) const;
 
+  // Updates the install result histogram and notifies the |delegate_| when the
+  // install has been cancelled by the user.
+  void OnInstallAborted();
+
   content::PageNavigator* navigator_;
   ExtensionInstallPrompt::Delegate* delegate_;
   scoped_refptr<ExtensionInstallPrompt::Prompt> prompt_;
@@ -149,6 +154,10 @@ class ExtensionInstallDialogView : public views::DialogDelegateView,
   // ExperienceSampling: Track this UI event.
   scoped_ptr<extensions::ExperienceSamplingEvent> sampling_event_;
 
+  // Set to true once the user's selection has been received and the
+  // |delegate_| has been notified.
+  bool handled_result_;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionInstallDialogView);
 };