Don't allow inline install if frame is deleted before user accepts

chrome/browser/extensions/webstore_inline_installer.h

Index: chrome/browser/extensions/webstore_inline_installer.h
diff --git a/chrome/browser/extensions/webstore_inline_installer.h b/chrome/browser/extensions/webstore_inline_installer.h
index 583a6c351de6fb31bd0ba67319aa22155d71bbe6..d4692ec11fdc890aed223ba28faf663ab580a2a9 100644
--- a/chrome/browser/extensions/webstore_inline_installer.h
+++ b/chrome/browser/extensions/webstore_inline_installer.h
@@ -31,6 +31,7 @@ class WebstoreInlineInstaller : public WebstoreStandaloneInstaller,
   typedef WebstoreStandaloneInstaller::Callback Callback;
 
   WebstoreInlineInstaller(content::WebContents* web_contents,
+                          content::RenderFrameHost* host,
                           const std::string& webstore_item_id,
                           const GURL& requestor_url,
                           const Callback& callback);
@@ -61,6 +62,9 @@ class WebstoreInlineInstaller : public WebstoreStandaloneInstaller,
 
  private:
   // content::WebContentsObserver interface implementation.
+  void FrameDeleted(content::RenderFrameHost* render_frame_host) override;
+  void RenderFrameHostChanged(content::RenderFrameHost* old_host,
+                              content::RenderFrameHost* new_host) override;
   void WebContentsDestroyed() override;
 
   // Checks whether the install is initiated by a page in a verified site
@@ -68,6 +72,8 @@ class WebstoreInlineInstaller : public WebstoreStandaloneInstaller,
   static bool IsRequestorURLInVerifiedSite(const GURL& requestor_url,
                                            const std::string& verified_site);
 
+  // This corresponds to the frame that initiated the install request.
+  content::RenderFrameHost* host_;
   GURL requestor_url_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(WebstoreInlineInstaller);