<webview>: Change how plugin load works inside guests.

chrome/browser/guestview/webview/webview_guest.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 CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_GUEST_H_
 #define CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_GUEST_H_
 
 #include "base/observer_list.h"
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/browser/guestview/guestview.h"
@@ skipping 11 matching lines @@
 // a particular embedder WebContents. This happens on either initial navigation
 // or through the use of the New Window API, when a new window is attached to
 // a particular <webview>.
 class WebViewGuest : public GuestView,
                      public content::NotificationObserver,
                      public content::WebContentsObserver {
  public:
   explicit WebViewGuest(content::WebContents* guest_web_contents);
 
   static WebViewGuest* From(int embedder_process_id, int instance_id);
+  static WebViewGuest* FromWebContents(content::WebContents* contents);
 
   // GuestView implementation.
   virtual void Attach(content::WebContents* embedder_web_contents,
                       const std::string& extension_id,
                       const base::DictionaryValue& args) OVERRIDE;
   virtual GuestView::Type GetViewType() const OVERRIDE;
   virtual WebViewGuest* AsWebView() OVERRIDE;
   virtual AdViewGuest* AsAdView() OVERRIDE;
 
   // GuestDelegate implementation.
@@ skipping 118 matching lines @@
   typedef std::map<int, PermissionResponseCallback> RequestMap;
   RequestMap pending_permission_requests_;
 
   // True if the user agent is overridden.
   bool is_overriding_user_agent_;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewGuest);
 };
 
 #endif  // CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_GUEST_H_