[Cross-Site Isolation] Migrate entire MediaStream verticals to be per-RenderFrame.

content/public/renderer/render_frame_observer.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 CONTENT_PUBLIC_RENDERER_RENDER_FRAME_OBSERVER_H_
 #define CONTENT_PUBLIC_RENDERER_RENDER_FRAME_OBSERVER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/strings/string16.h"
@@ skipping 36 matching lines @@
   virtual void DidCommitProvisionalLoad(bool is_new_navigation) {}
   virtual void DidStartProvisionalLoad() {}
   virtual void DidFailProvisionalLoad(const blink::WebURLError& error) {}
   virtual void DidFinishLoad() {}
   virtual void DidFinishDocumentLoad() {}
   virtual void WillReleaseScriptContext(v8::Handle<v8::Context> context,
                                         int world_id) {}
   virtual void DidClearWindowObject() {}
   virtual void DidChangeName(const base::string16& name) {}
 
+  // Called when the frame will soon be closed. This is the last opportunity to
+  // send messages to the host (e.g., for clean-up, shutdown, etc.).
+  virtual void FrameWillClose() {}
+
   // Called when we receive a console message from Blink for which we requested
   // extra details (like the stack trace). |message| is the error message,
   // |source| is the Blink-reported source of the error (either external or
   // internal), and |stack_trace| is the stack trace of the error in a
   // human-readable format (each frame is formatted as
   // "\n    at function_name (source:line_number:column_number)").
   virtual void DetailedConsoleMessageAdded(const base::string16& message,
                                            const base::string16& source,
                                            const base::string16& stack_trace,
                                            int32 line_number,
@@ skipping 25 matching lines @@
   RenderFrame* render_frame_;
   // The routing ID of the associated RenderFrame.
   int routing_id_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_RENDER_FRAME_OBSERVER_H_