Add SpdyString alias for std::string in net/spdy.

net/spdy/spdy_session_test_util.cc

 // Copyright (c) 2013 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 "net/spdy/spdy_session_test_util.h"
 
 #include "base/location.h"
 #include "base/strings/string_util.h"
 
 namespace net {
 
 SpdySessionTestTaskObserver::SpdySessionTestTaskObserver(
-    const std::string& file_name,
-    const std::string& function_name)
-    : executed_count_(0),
-      file_name_(file_name),
-      function_name_(function_name) {
+    const SpdyString& file_name,
+    const SpdyString& function_name)
+    : executed_count_(0), file_name_(file_name), function_name_(function_name) {
   base::MessageLoop::current()->AddTaskObserver(this);
 }
 
 SpdySessionTestTaskObserver::~SpdySessionTestTaskObserver() {
   base::MessageLoop::current()->RemoveTaskObserver(this);
 }
 
 void SpdySessionTestTaskObserver::WillProcessTask(
     const base::PendingTask& pending_task) {
 }
 
 void SpdySessionTestTaskObserver::DidProcessTask(
     const base::PendingTask& pending_task) {
   if (base::EndsWith(pending_task.posted_from.file_name(), file_name_,
                      base::CompareCase::SENSITIVE) &&
       base::EndsWith(pending_task.posted_from.function_name(), function_name_,
                      base::CompareCase::SENSITIVE)) {
     ++executed_count_;
   }
 }
 
 }  // namespace net