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

extensions/renderer/script_context.cc

Index: extensions/renderer/script_context.cc
diff --git a/extensions/renderer/script_context.cc b/extensions/renderer/script_context.cc
index 0dff2e5131cc9cadbff05f38487ce48f86d99194..9b791f3e1234833c7eee521ceba1d1d585325756 100644
--- a/extensions/renderer/script_context.cc
+++ b/extensions/renderer/script_context.cc
@@ -132,7 +132,8 @@ bool ScriptContext::IsSandboxedPage(const GURL& url) {
     const Extension* extension =
         RendererExtensionRegistry::Get()->GetByID(url.host());
     if (extension) {
-      return SandboxedPageInfo::IsSandboxedPage(extension, url.path());
+      return SandboxedPageInfo::IsSandboxedPage(extension,
+                                                url.path().as_string());
     }
   }
   return false;
@@ -402,8 +403,8 @@ bool ScriptContext::HasAccessOrThrowError(const std::string& name) {
   //
   // [1] citation needed. This ScriptContext should already be in a state that
   // doesn't allow this, from ScriptContextSet::ClassifyJavaScriptContext.
-  if (extension() &&
-      SandboxedPageInfo::IsSandboxedPage(extension(), url_.path())) {
+  if (extension() && SandboxedPageInfo::IsSandboxedPage(
+                         extension(), url_.path().as_string())) {
     static const char kMessage[] =
         "%s cannot be used within a sandboxed frame.";
     std::string error_msg = base::StringPrintf(kMessage, name.c_str());