Reduce string copies in GURL creation

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 00c278e9debd13901b9162cceacf0ac203057a2b..cb25629a566ebe1593f72b7d3262ab8ba66e22ff 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -51,6 +51,7 @@
 #include "content/common/site_isolation_policy.h"
 #include "content/common/ssl_status_serialization.h"
 #include "content/common/view_messages.h"
+#include "content/public/child/url_conversion.h"
 #include "content/public/common/bindings_policy.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_constants.h"
@@ -316,8 +317,9 @@ static RenderViewImpl* (*g_create_render_view_impl)(
 Referrer RenderViewImpl::GetReferrerFromRequest(
     WebFrame* frame,
     const WebURLRequest& request) {
-  return Referrer(GURL(request.httpHeaderField(WebString::fromUTF8("Referer"))),
-                  request.referrerPolicy());
+  return Referrer(
+      WebStringToGURL(request.httpHeaderField(WebString::fromUTF8("Referer"))),
+      request.referrerPolicy());
 }
 
 // static
@@ -1606,10 +1608,11 @@ WebView* RenderViewImpl::createView(WebLocalFrame* creator,
     params.opener_top_level_frame_url = creator->top()->document().url();
   } else {
     params.opener_top_level_frame_url =
-        GURL(creator->top()->securityOrigin().toString());
+        WebStringToGURL(creator->top()->securityOrigin().toString());
   }
 
-  GURL security_url(creator->document().securityOrigin().toString());
+  GURL security_url(WebStringToGURL(
+      creator->document().securityOrigin().toString()));
   if (!security_url.is_valid())
     security_url = GURL();
   params.opener_security_origin = security_url;