Const-ify RefCountedThreadSafe::AddRef and Release.

chrome/browser/sync/glue/http_bridge_unittest.cc

 // Copyright (c) 2006-2008 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 "base/message_loop_proxy.h"
 #include "base/thread.h"
 #include "chrome/browser/browser_thread.h"
 #include "chrome/browser/sync/glue/http_bridge.h"
 #include "chrome/common/net/test_url_fetcher_factory.h"
 #include "net/url_request/url_request_unittest.h"
 #include "net/test/test_server.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using browser_sync::HttpBridge;
 
 namespace {
 // TODO(timsteele): Should use PathService here. See Chromium Issue 3113.
 const FilePath::CharType kDocRoot[] = FILE_PATH_LITERAL("chrome/test/data");
 }
 
 // Lazy getter for TestURLRequestContext instances.
 class TestURLRequestContextGetter : public URLRequestContextGetter {
  public:
   virtual URLRequestContext* GetURLRequestContext() {
     if (!context_)
       context_ = new TestURLRequestContext;
     return context_;
   }
-  virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() {
+  virtual scoped_refptr<base::MessageLoopProxy> GetIOMessageLoopProxy() const {
     return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
   }
 
  private:
   ~TestURLRequestContextGetter() {}
 
   scoped_refptr<URLRequestContext> context_;
 };
 
 class HttpBridgeTest : public testing::Test {
@@ skipping 230 matching lines @@
   int os_error = 0;
   int response_code = 0;
   bool success = http_bridge->MakeSynchronousPost(&os_error, &response_code);
   EXPECT_TRUE(success);
   EXPECT_EQ(200, response_code);
   EXPECT_EQ(0, os_error);
 
   EXPECT_EQ(http_bridge->GetResponseHeaderValue("Content-type"), "text/html");
   EXPECT_TRUE(http_bridge->GetResponseHeaderValue("invalid-header").empty());
 }