<webview>: Store <webview> embedder info in ExtensionRendererState

content/public/browser/web_contents.h

 // Copyright (c) 2012 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_BROWSER_WEB_CONTENTS_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/process_util.h"
@@ skipping 128 matching lines @@
                               int /* y */)> GetRenderViewHostCallback;
   // Gets the RenderViewHost at coordinates (|x|, |y|) for this WebContents via
   // |callback|.
   // This can be different than the current RenderViewHost if there is a
   // BrowserPlugin at the specified position.
   virtual void GetRenderViewHostAtPosition(
       int x,
       int y,
       const GetRenderViewHostCallback& callback) = 0;
 
+  // Returns the WebContents embedding this WebContents, if any.
+  // If this is a top-level WebContents then it returns NULL.
+  virtual WebContents* GetEmbedderWebContents() const = 0;
+
+  // Gets the instance ID of the current WebContents if it is embedded
+  // within a BrowserPlugin. It returns 0 if not.
+  virtual int GetInstanceID() const = 0;

[jam, 2013/02/06 17:02:09]

why does this need to be exposed? i don't see it used in the current cl

[Fady Samuel, 2013/02/06 17:06:00]

It is, see in ExtensionRendererState

web_view_info.web_view_instance_id = web_contents->GetInstanceID();

+
   // Gets the current RenderViewHost's routing id. Returns
   // MSG_ROUTING_NONE when there is no RenderViewHost.
   virtual int GetRoutingID() const = 0;
 
   // Returns the currently active RenderWidgetHostView. This may change over
   // time and can be NULL (during setup and teardown).
   virtual content::RenderWidgetHostView* GetRenderWidgetHostView() const = 0;
 
   // The WebContentsView will never change and is guaranteed non-NULL.
   virtual WebContentsView* GetView() const = 0;
@@ skipping 275 matching lines @@
   // is not resized to the given image_size. If 0 is passed, the first frame of
   // the image is returned.
   virtual int DownloadFavicon(const GURL& url, int image_size,
                               const FaviconDownloadCallback& callback) = 0;
 
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_