Simplify the user agent code some more since after r255534 it's not affected by the site's URL.

content/renderer/renderer_webkitplatformsupport_impl.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_RENDERER_RENDERER_WEBKITPLATFORMSUPPORT_IMPL_H_
 #define CONTENT_RENDERER_RENDERER_WEBKITPLATFORMSUPPORT_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/platform_file.h"
@@ skipping 109 matching lines @@
       blink::WebAudioBus* destination_bus, const char* audio_file_data,
       size_t data_size, double sample_rate);
 
   virtual blink::WebContentDecryptionModule* createContentDecryptionModule(
       const blink::WebString& key_system);
   virtual blink::WebMIDIAccessor*
       createMIDIAccessor(blink::WebMIDIAccessorClient* client);
 
   virtual blink::WebBlobRegistry* blobRegistry();
   virtual void sampleGamepads(blink::WebGamepads&);
-  virtual blink::WebString userAgent(const blink::WebURL& url);
   virtual blink::WebRTCPeerConnectionHandler* createRTCPeerConnectionHandler(
       blink::WebRTCPeerConnectionHandlerClient* client);
   virtual blink::WebMediaStreamCenter* createMediaStreamCenter(
       blink::WebMediaStreamCenterClient* client);
   virtual bool processMemorySizesInBytes(
       size_t* private_bytes, size_t* shared_bytes);
   virtual blink::WebGraphicsContext3D* createOffscreenGraphicsContext3D(
 #ifdef ENABLE_EXPLICIT_GL_SHARE_GROUPS
       const blink::WebGraphicsContext3D::Attributes& attributes,
       blink::WebGraphicsContext3D* share_context);
@@ skipping 88 matching lines @@
   scoped_ptr<ScreenOrientationDispatcher> screen_orientation_dispatcher_;
 
   scoped_ptr<blink::WebScrollbarBehavior> web_scrollbar_behavior_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererWebKitPlatformSupportImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDERER_WEBKITPLATFORMSUPPORT_IMPL_H_