Reduce string copies in GURL creation

content/renderer/media/cdm/pepper_cdm_wrapper_impl.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.
 
 #if defined(ENABLE_PEPPER_CDMS)
 #include "content/renderer/media/cdm/pepper_cdm_wrapper_impl.h"
 
 #include <utility>
 
+#include "content/public/child/url_conversion.h"
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 #include "content/renderer/pepper/pepper_webplugin_impl.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebElement.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebHelperPlugin.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebPlugin.h"
 #include "third_party/WebKit/public/web/WebPluginContainer.h"
 #include "third_party/WebKit/public/web/WebView.h"
 
 namespace content {
 
 void WebHelperPluginDeleter::operator()(blink::WebHelperPlugin* plugin) const {
   plugin->destroy();
 }
 
 scoped_ptr<PepperCdmWrapper> PepperCdmWrapperImpl::Create(
     blink::WebLocalFrame* frame,
     const std::string& pluginType,
     const GURL& security_origin) {
   DCHECK(frame);
 
   // The frame security origin could be different from the origin where the CDM
   // creation was initiated, e.g. due to navigation.
   // Note: The code will continue after navigation to the "same" origin, even
   // though the CDM is no longer necessary.
   // TODO: Consider avoiding this possibility entirely. http://crbug.com/575236
-  GURL frame_security_origin(frame->securityOrigin().toString());
+  GURL frame_security_origin(
+      WebStringToGURL(frame->securityOrigin().toString()));
   if (frame_security_origin != security_origin) {
     LOG(ERROR) << "Frame has a different origin than the EME call.";
     return scoped_ptr<PepperCdmWrapper>();
   }
 
   ScopedHelperPlugin helper_plugin(blink::WebHelperPlugin::create(
       blink::WebString::fromUTF8(pluginType), frame));
   if (!helper_plugin)
     return scoped_ptr<PepperCdmWrapper>();
 
@@ skipping 36 matching lines @@
   helper_plugin_.reset();
 }
 
 ContentDecryptorDelegate* PepperCdmWrapperImpl::GetCdmDelegate() {
   return plugin_instance_->GetContentDecryptorDelegate();
 }
 
 }  // namespace content
 
 #endif  // defined(ENABLE_PEPPER_CDMS)