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

google_apis/drive/test_util.cc

Index: google_apis/drive/test_util.cc
diff --git a/google_apis/drive/test_util.cc b/google_apis/drive/test_util.cc
index a6497ca981ffd919a77e6b5e39287bcf7c89e743..ffead523d10de0574795842892183a7019c34d46 100644
--- a/google_apis/drive/test_util.cc
+++ b/google_apis/drive/test_util.cc
@@ -116,8 +116,10 @@ std::unique_ptr<net::test_server::HttpResponse> HandleDownloadFileRequest(
 
   GURL absolute_url = base_url.Resolve(request.relative_url);
   std::string remaining_path;
-  if (!RemovePrefix(absolute_url.path(), "/files/", &remaining_path))
+  if (!RemovePrefix(absolute_url.path().as_string(), "/files/",
+                    &remaining_path)) {
     return std::unique_ptr<net::test_server::HttpResponse>();
+  }
   return CreateHttpResponseFromFile(GetTestFilePath(remaining_path));
 }