Ensure that entries are correctly removed from the MimeHandlerViewContainer map

extensions/renderer/guest_view/mime_handler_view/mime_handler_view_container.h

 // Copyright 2014 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_RENDERER_GUEST_VIEW_MIME_HANDLER_VIEW_MIME_HANDLER_VIEW_CONTAINER_H_
 #define EXTENSIONS_RENDERER_GUEST_VIEW_MIME_HANDLER_VIEW_MIME_HANDLER_VIEW_CONTAINER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 47 matching lines @@
 
   // WebURLLoaderClient overrides.
   void didReceiveData(blink::WebURLLoader* loader,
                       const char* data,
                       int data_length,
                       int encoded_data_length) override;
   void didFinishLoading(blink::WebURLLoader* loader,
                         double finish_time,
                         int64_t total_encoded_data_length) override;
 
+  // GuestViewContainer overrides.
+  void OnRenderFrameDestroyed() override;
+
   // Post a JavaScript message to the guest.
   void PostMessage(v8::Isolate* isolate,
                    v8::Handle<v8::Value> message);
 
   // Post |message| to the guest.
   void PostMessageFromValue(const base::Value& message);
 
  private:
   // Message handlers.
   void OnCreateMimeHandlerViewGuestACK(int element_instance_id);
@@ skipping 38 matching lines @@
   gfx::Size element_size_;
 
   base::WeakPtrFactory<MimeHandlerViewContainer> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MimeHandlerViewContainer);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_GUEST_VIEW_MIME_HANDLER_VIEW_MIME_HANDLER_VIEW_CONTAINER_H_