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extensions/browser/guest_view/mime_handler_view/mime_handler_stream_manager.cc

Index: extensions/browser/guest_view/mime_handler_view/mime_handler_stream_manager.cc
diff --git a/extensions/browser/guest_view/mime_handler_view/mime_handler_stream_manager.cc b/extensions/browser/guest_view/mime_handler_view/mime_handler_stream_manager.cc
index 78b76340f07594e71f6b6e7d9303300e5cf9cdd8..9be58cc516abff195a611535dd41382f6f3a7cf3 100644
--- a/extensions/browser/guest_view/mime_handler_view/mime_handler_stream_manager.cc
+++ b/extensions/browser/guest_view/mime_handler_view/mime_handler_stream_manager.cc
@@ -72,10 +72,10 @@ class MimeHandlerStreamManager::EmbedderObserver
     : public content::WebContentsObserver {
  public:
   EmbedderObserver(MimeHandlerStreamManager* stream_manager,
+                   const std::string& view_id,
+                   content::WebContents* web_contents,
                    int render_process_id,
-                   int render_frame_id,
-                   const std::string& view_id);
-
+                   int render_frame_id);
  private:
   // WebContentsObserver overrides.
   void RenderFrameDeleted(content::RenderFrameHost* render_frame_host) override;
@@ -113,13 +113,14 @@ MimeHandlerStreamManager* MimeHandlerStreamManager::Get(
 void MimeHandlerStreamManager::AddStream(
     const std::string& view_id,
     std::unique_ptr<StreamContainer> stream,
+    content::WebContents* web_contents,
     int render_process_id,
     int render_frame_id) {
   streams_by_extension_id_[stream->extension_id()].insert(view_id);
   auto result = streams_.insert(std::make_pair(view_id, std::move(stream)));
   DCHECK(result.second);
   embedder_observers_[view_id] = base::MakeUnique<EmbedderObserver>(
-      this, render_process_id, render_frame_id, view_id);
+      this, view_id, web_contents, render_process_id, render_frame_id);
 }
 
 std::unique_ptr<StreamContainer> MimeHandlerStreamManager::ReleaseStream(
@@ -153,12 +154,11 @@ void MimeHandlerStreamManager::OnExtensionUnloaded(
 
 MimeHandlerStreamManager::EmbedderObserver::EmbedderObserver(
     MimeHandlerStreamManager* stream_manager,
+    const std::string& view_id,
+    content::WebContents* web_contents,
     int render_process_id,
-    int render_frame_id,
-    const std::string& view_id)
-    : WebContentsObserver(content::WebContents::FromRenderFrameHost(
-          content::RenderFrameHost::FromID(render_process_id,
-                                           render_frame_id))),
+    int render_frame_id)
+    : WebContentsObserver(web_contents),
       stream_manager_(stream_manager),
       render_process_id_(render_process_id),
       render_frame_id_(render_frame_id),