Reduce string copies in GURL creation

content/renderer/render_frame_proxy.cc

 // Copyright 2014 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_proxy.h"
 
 #include <stdint.h>
 #include <map>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "content/child/webmessageportchannel_impl.h"
 #include "content/common/frame_messages.h"
 #include "content/common/frame_replication_state.h"
 #include "content/common/input_messages.h"
 #include "content/common/site_isolation_policy.h"
 #include "content/common/swapped_out_messages.h"
 #include "content/common/view_messages.h"
+#include "content/public/child/url_conversion.h"
 #include "content/renderer/child_frame_compositing_helper.h"
 #include "content/renderer/render_frame_impl.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
 #include "third_party/WebKit/public/web/WebView.h"
 
 namespace content {
@@ skipping 394 matching lines @@
     float scale_factor) {
   Send(new FrameHostMsg_InitializeChildFrame(
       routing_id_, frame_rect, scale_factor));
 }
 
 void RenderFrameProxy::navigate(const blink::WebURLRequest& request,
                                 bool should_replace_current_entry) {
   FrameHostMsg_OpenURL_Params params;
   params.url = request.url();
   params.referrer = Referrer(
-      GURL(request.httpHeaderField(blink::WebString::fromUTF8("Referer"))),
+      WebStringToGURL(
+          request.httpHeaderField(blink::WebString::fromUTF8("Referer"))),
       request.referrerPolicy());
   params.disposition = CURRENT_TAB;
   params.should_replace_current_entry = should_replace_current_entry;
   params.user_gesture =
       blink::WebUserGestureIndicator::isProcessingUserGesture();
   blink::WebUserGestureIndicator::consumeUserGesture();
   Send(new FrameHostMsg_OpenURL(routing_id_, params));
 }
 
 void RenderFrameProxy::forwardInputEvent(const blink::WebInputEvent* event) {
@@ skipping 24 matching lines @@
                                     blink::WebLocalFrame* source) {
   int source_routing_id = RenderFrameImpl::FromWebFrame(source)->GetRoutingID();
   Send(new FrameHostMsg_AdvanceFocus(routing_id_, type, source_routing_id));
 }
 
 void RenderFrameProxy::frameFocused() {
   Send(new FrameHostMsg_FrameFocused(routing_id_));
 }
 
 }  // namespace