[WIP] make GURL::path() return a StringPiece

google_apis/gaia/fake_gaia.cc

Index: google_apis/gaia/fake_gaia.cc
diff --git a/google_apis/gaia/fake_gaia.cc b/google_apis/gaia/fake_gaia.cc
index ce62f1f1703db8c5dd91fcf770e6483c8d8a787e..d4e3cd9af11d2a3b5e639e8613bd550ab3a26659 100644
--- a/google_apis/gaia/fake_gaia.cc
+++ b/google_apis/gaia/fake_gaia.cc
@@ -31,8 +31,9 @@
 #include "url/third_party/mozilla/url_parse.h"
 
 #define REGISTER_RESPONSE_HANDLER(url, method) \
-  request_handlers_.insert(std::make_pair( \
-        url.path(), base::Bind(&FakeGaia::method, base::Unretained(this))))
+  request_handlers_.insert(                    \
+      std::make_pair(url.path().as_string(),   \
+                     base::Bind(&FakeGaia::method, base::Unretained(this))))
 
 #define REGISTER_PATH_RESPONSE_HANDLER(path, method) \
   request_handlers_.insert(std::make_pair( \
@@ -305,9 +306,10 @@ std::unique_ptr<HttpResponse> FakeGaia::HandleRequest(
   // The scheme and host of the URL is actually not important but required to
   // get a valid GURL in order to parse |request.relative_url|.
   GURL request_url = GURL("http://localhost").Resolve(request.relative_url);
-  std::string request_path = request_url.path();
+  base::StringPiece request_path = request_url.path();
   std::unique_ptr<BasicHttpResponse> http_response(new BasicHttpResponse());
-  RequestHandlerMap::iterator iter = request_handlers_.find(request_path);
+  RequestHandlerMap::iterator iter =
+      request_handlers_.find(request_path.as_string());
   if (iter != request_handlers_.end()) {
     LOG(WARNING) << "Serving request " << request_path;
     iter->second.Run(request, http_response.get());