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

extensions/shell/browser/shell_nacl_browser_delegate.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/shell/browser/shell_nacl_browser_delegate.h"
 
 #include <string>
 
 #include "base/base_paths.h"
 #include "base/command_line.h"
@@ skipping 141 matching lines @@
   const Extension* extension =
       info_map->extensions().GetExtensionOrAppByURL(file_url);
   if (!extension)
     return false;
 
   // This is a short-cut which avoids calling a blocking file operation
   // (GetFilePath()), so that this can be called on the IO thread. It only
   // handles a subset of the urls.
   if (!use_blocking_api) {
     if (file_url.SchemeIs(kExtensionScheme)) {
-      std::string path = file_url.path();
+      std::string path = file_url.path().as_string();
       base::TrimString(path, "/", &path);  // Remove first slash
       *file_path = extension->path().AppendASCII(path);
       return true;
     }
     return false;
   }
 
   // Check that the URL references a resource in the extension.
   // NOTE: app_shell does not support shared modules.
-  ExtensionResource resource = extension->GetResource(file_url.path());
+  ExtensionResource resource =
+      extension->GetResource(file_url.path().as_string());
   if (resource.empty())
     return false;
 
   // GetFilePath is a blocking function call.
   const base::FilePath resource_file_path = resource.GetFilePath();
   if (resource_file_path.empty())
     return false;
 
   *file_path = resource_file_path;
   return true;
 }
 
 content::BrowserPpapiHost::OnKeepaliveCallback
 ShellNaClBrowserDelegate::GetOnKeepaliveCallback() {
   return base::Bind(&OnKeepalive);
 }
 
 bool ShellNaClBrowserDelegate::IsNonSfiModeAllowed(
     const base::FilePath& profile_directory,
     const GURL& manifest_url) {
   return false;
 }
 
 }  // namespace extensions