Reduce string copies in GURL creation

content/test/weburl_loader_mock.cc

Index: content/test/weburl_loader_mock.cc
diff --git a/content/test/weburl_loader_mock.cc b/content/test/weburl_loader_mock.cc
index 8f8b70494ea5a6b4c04d948b0e91b01c270635d7..62922e2a0a0b0d46bf30a4ffe0b6c7ecade5d589 100644
--- a/content/test/weburl_loader_mock.cc
+++ b/content/test/weburl_loader_mock.cc
@@ -8,6 +8,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "content/child/web_url_loader_impl.h"
 #include "content/test/weburl_loader_mock_factory.h"
+#include "third_party/WebKit/public/platform/URLConversion.h"
 #include "third_party/WebKit/public/platform/WebData.h"
 #include "third_party/WebKit/public/platform/WebURLError.h"
 #include "third_party/WebKit/public/platform/WebURLLoaderClient.h"
@@ -66,7 +67,8 @@ void WebURLLoaderMock::ServeAsynchronousRequest(
 blink::WebURLRequest WebURLLoaderMock::ServeRedirect(
     const blink::WebURLRequest& request,
     const blink::WebURLResponse& redirectResponse) {
-  GURL redirectURL(redirectResponse.httpHeaderField("Location"));
+  GURL redirectURL(
+      blink::WebStringToGURL(redirectResponse.httpHeaderField("Location")));
 
   net::RedirectInfo redirectInfo;
   redirectInfo.new_method = request.httpMethod().utf8();