Fix some warnings on Mac that are treated as errors:...

chrome/browser/sync/engine/net/gaia_authenticator_unittest.cc

 // Copyright (c) 2009 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 "chrome/browser/sync/engine/net/gaia_authenticator.h"
 
 #include <string>
 
 #include "chrome/browser/sync/engine/net/http_return.h"
 #include "chrome/browser/sync/util/sync_types.h"
 #include "googleurl/src/gurl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using std::string;
 
 namespace browser_sync {
 
 class GaiaAuthenticatorTest : public testing::Test { };
 
-class GaiaAuthMock : public GaiaAuthenticator {
+class GaiaAuthMockForGaiaAuthenticator : public GaiaAuthenticator {
  public:
-  GaiaAuthMock() : GaiaAuthenticator("useragent",
-                                     "serviceid",
-                                     "http://gaia_url") {}
-  ~GaiaAuthMock() {}
+  GaiaAuthMockForGaiaAuthenticator()
+      : GaiaAuthenticator("useragent", "serviceid", "http://gaia_url") {}
+  ~GaiaAuthMockForGaiaAuthenticator() {}
  protected:
   bool Post(const GURL& url, const string& post_body,
             unsigned long* response_code, string* response_body) {
     *response_code = RC_REQUEST_OK;
     response_body->assign("body\n");
     return true;
   }
 };
 
 TEST(GaiaAuthenticatorTest, TestNewlineAtEndOfAuthTokenRemoved) {
-  GaiaAuthMock mock_auth;
+  GaiaAuthMockForGaiaAuthenticator mock_auth;
   MessageLoop message_loop;
   mock_auth.set_message_loop(&message_loop);
   GaiaAuthenticator::AuthResults results;
   EXPECT_TRUE(mock_auth.IssueAuthToken(&results, "sid", true));
   EXPECT_EQ(0, results.auth_token.compare("body"));
 }
 
 }  // namespace browser_sync