Allow override of user agent depending on url.

content/renderer/render_frame_impl.cc

 // 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.
 
 #include "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 3111 matching lines @@
       params.source_routing_id = source_view->routing_id();
   }
 
   Send(new ViewHostMsg_RouteMessageEvent(render_view_->routing_id_, params));
   return true;
 }
 
 blink::WebString RenderFrameImpl::userAgentOverride(blink::WebLocalFrame* frame,
                                                     const blink::WebURL& url) {
   DCHECK(!frame_ || frame_ == frame);
+
+  ObserverListBase<RenderFrameObserver>::Iterator it(observers_);
+  RenderFrameObserver* observer;
+  while ((observer = it.GetNext()) != NULL) {
+    std::string user_agent_override_for_url =
+        observer->GetUserAgentOverrideForURL(GURL(url));
+    if (!user_agent_override_for_url.empty())
+      return WebString::fromUTF8(user_agent_override_for_url);
+  }
+
   if (!render_view_->webview() || !render_view_->webview()->mainFrame() ||
       render_view_->renderer_preferences_.user_agent_override.empty()) {
     return blink::WebString();
   }
 
   // If we're in the middle of committing a load, the data source we need
   // will still be provisional.
   WebFrame* main_frame = render_view_->webview()->mainFrame();
   WebDataSource* data_source = NULL;
   if (main_frame->provisionalDataSource())
@@ skipping 787 matching lines @@
 
 #if defined(ENABLE_BROWSER_CDMS)
 RendererCdmManager* RenderFrameImpl::GetCdmManager() {
   if (!cdm_manager_)
     cdm_manager_ = new RendererCdmManager(this);
   return cdm_manager_;
 }
 #endif  // defined(ENABLE_BROWSER_CDMS)
 
 }  // namespace content