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

chrome/renderer/extensions/resource_request_policy.cc

Index: chrome/renderer/extensions/resource_request_policy.cc
diff --git a/chrome/renderer/extensions/resource_request_policy.cc b/chrome/renderer/extensions/resource_request_policy.cc
index b426f0911b67bf93811e94435bd3d9816f849fed..4df0c74721b9ac569cd6204bc58ffe0cfeda9f87 100644
--- a/chrome/renderer/extensions/resource_request_policy.cc
+++ b/chrome/renderer/extensions/resource_request_policy.cc
@@ -56,7 +56,7 @@ bool ResourceRequestPolicy::CanRequestResource(
   // launchers.
   std::string resource_root_relative_path =
       resource_url.path().empty() ? std::string()
-      : resource_url.path().substr(1);
+                                  : resource_url.path().substr(1).as_string();
   if (extension->is_hosted_app() &&
       !IconsInfo::GetIcons(extension)
           .ContainsPath(resource_root_relative_path)) {
@@ -68,10 +68,10 @@ bool ResourceRequestPolicy::CanRequestResource(
   // Disallow loading of extension resources which are not explicitly listed
   // as web or WebView accessible if the manifest version is 2 or greater.
   if (!WebAccessibleResourcesInfo::IsResourceWebAccessible(
-          extension, resource_url.path()) &&
+          extension, resource_url.path().as_string()) &&
       !WebviewInfo::IsResourceWebviewAccessible(
           extension, dispatcher_->webview_partition_id(),
-          resource_url.path())) {
+          resource_url.path().as_string())) {
     GURL frame_url = frame->document().url();
 
     // The page_origin may be GURL("null") for unique origins like data URLs,