Remove 'WebPlugin::CheckIfRunInsecureContent'.

content/child/npapi/webplugin.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_CHILD_NPAPI_WEBPLUGIN_H_
 #define CONTENT_CHILD_NPAPI_WEBPLUGIN_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 76 matching lines @@
 
   // Defers the loading of the resource identified by resource_id. This is
   // controlled by the defer parameter.
   virtual void SetDeferResourceLoading(unsigned long resource_id,
                                        bool defer) = 0;
 
   // Handles NPN_URLRedirectResponse calls issued by plugins in response to
   // HTTP URL redirect notifications.
   virtual void URLRedirectResponse(bool allow, int resource_id) = 0;
 
-  // Returns true if the new url is a secure transition. This is to catch a
-  // plugin src url transitioning from https to http.
-  virtual bool CheckIfRunInsecureContent(const GURL& url) = 0;
-
 #if defined(OS_WIN)
   // |pump_messages_event| is a event handle which is used in NPP_HandleEvent
   // calls to pump messages if the plugin enters a modal loop.
   // |dummy_activation_window} is used to ensure correct keyboard activation.
   // It needs to be a child of the parent window.
   virtual void SetWindowlessData(HANDLE pump_messages_event,
                                  gfx::NativeViewId dummy_activation_window) = 0;
 #endif
 
 #if defined(OS_MACOSX)
@@ skipping 13 matching lines @@
   virtual void AcceleratedPluginAllocatedIOSurface(int32_t width,
                                                    int32_t height,
                                                    uint32_t surface_id) = 0;
   virtual void AcceleratedPluginSwappedIOSurface() = 0;
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_NPAPI_WEBPLUGIN_H_