Cleanup: Pass std::string as const reference from content/

content/public/test/content_browser_test_utils.cc

 // Copyright (c) 2012 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 "content/public/test/content_browser_test_utils.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
@@ skipping 35 matching lines @@
 void ReloadBlockUntilNavigationsComplete(Shell* window,
                                          int number_of_navigations) {
   WaitForLoadStop(window->web_contents());
   TestNavigationObserver same_tab_observer(window->web_contents(),
                                            number_of_navigations);
 
   window->Reload();
   same_tab_observer.Wait();
 }
 
-void LoadDataWithBaseURL(Shell* window, const GURL& url,
-    const std::string data, const GURL& base_url) {
+void LoadDataWithBaseURL(Shell* window,
+                         const GURL& url,
+                         const std::string& data,
+                         const GURL& base_url) {
   WaitForLoadStop(window->web_contents());
   TestNavigationObserver same_tab_observer(window->web_contents(), 1);
 
   window->LoadDataWithBaseURL(url, data, base_url);
   same_tab_observer.Wait();
 }
 
 bool NavigateToURL(Shell* window, const GURL& url) {
   NavigateToURLBlockUntilNavigationsComplete(window, url, 1);
   if (!IsLastCommittedEntryOfPageType(window->web_contents(),
@@ skipping 41 matching lines @@
 
 void ShellAddedObserver::ShellCreated(Shell* shell) {
   DCHECK(!shell_);
   shell_ = shell;
   if (runner_.get())
     runner_->QuitClosure().Run();
 }
 
 
 }  // namespace content