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

google_apis/drive/drive_api_requests_unittest.cc

Index: google_apis/drive/drive_api_requests_unittest.cc
diff --git a/google_apis/drive/drive_api_requests_unittest.cc b/google_apis/drive/drive_api_requests_unittest.cc
index ace07f3bfeb5708579661ca4e4fdc56025cabdfb..dfb7fbd745ee72319e97f9adaa92429eeb09d9a3 100644
--- a/google_apis/drive/drive_api_requests_unittest.cc
+++ b/google_apis/drive/drive_api_requests_unittest.cc
@@ -445,8 +445,8 @@ class DriveApiRequestsTest : public testing::Test {
 
     const GURL absolute_url = test_server_.GetURL(request.relative_url);
     std::string id;
-    if (!test_util::RemovePrefix(
-          absolute_url.path(), kTestDownloadPathPrefix, &id) ||
+    if (!test_util::RemovePrefix(absolute_url.path().as_string(),
+                                 kTestDownloadPathPrefix, &id) ||
         absolute_url.query() != kTestDownloadFileQuery) {
       return std::unique_ptr<net::test_server::HttpResponse>();
     }