Clear UIThreadExtensionFunction::render_frame_host_ when RFH is gone.

extensions/browser/extension_function.h

 // Copyright 2013 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 EXTENSIONS_BROWSER_EXTENSION_FUNCTION_H_
 #define EXTENSIONS_BROWSER_EXTENSION_FUNCTION_H_
 
 #include <stddef.h>
 
 #include <list>
@@ skipping 480 matching lines @@
   }
 
   void set_dispatcher(const base::WeakPtr<
       extensions::ExtensionFunctionDispatcher>& dispatcher) {
     dispatcher_ = dispatcher;
   }
   extensions::ExtensionFunctionDispatcher* dispatcher() const {
     return dispatcher_.get();
   }
 
+  void set_is_from_service_worker(bool value) {
+    is_from_service_worker_ = value;
+  }
+
   // Gets the "current" web contents if any. If there is no associated web
   // contents then defaults to the foremost one.
   // NOTE: "current" can mean different things in different contexts. You
   // probably want to use GetSenderWebContents().
   virtual content::WebContents* GetAssociatedWebContents();
 
   // Returns the web contents associated with the sending |render_frame_host_|.
   // This can be null.
   content::WebContents* GetSenderWebContents();
 
@@ skipping 21 matching lines @@
   class RenderFrameHostTracker;
 
   void Destruct() const override;
 
   // The dispatcher that will service this extension function call.
   base::WeakPtr<extensions::ExtensionFunctionDispatcher> dispatcher_;
 
   // The RenderFrameHost we will send responses to.
   content::RenderFrameHost* render_frame_host_;
 
+  // Whether or not this ExtensionFunction was called by an extension Service
+  // Worker.
+  bool is_from_service_worker_;
+
   std::unique_ptr<RenderFrameHostTracker> tracker_;
 
   DelegateForTests* delegate_;
 
   // The blobs transferred to the renderer process.
   std::vector<std::string> transferred_blob_uuids_;
 
   DISALLOW_COPY_AND_ASSIGN(UIThreadExtensionFunction);
 };
 
@@ skipping 130 matching lines @@
  private:
   // If you're hitting a compile error here due to "final" - great! You're
   // doing the right thing, you just need to extend IOThreadExtensionFunction
   // instead of SyncIOExtensionFunction.
   ResponseAction Run() final;
 
   DISALLOW_COPY_AND_ASSIGN(SyncIOThreadExtensionFunction);
 };
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_FUNCTION_H_