Fix Mac component build by using correct #define in ui/gfx/color_profile.cc.

ui/gfx/color_profile.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 "ui/gfx/color_profile.h"
 
 namespace gfx {
 
-#if defined(OS_WIN) || defined(OS_MAC)
+#if defined(OS_WIN) || defined(OS_MACOSX)
 void ReadColorProfile(std::vector<char>* profile);
 #else
 void ReadColorProfile(std::vector<char>* profile) { }
 #endif
 
 void GetColorProfile(std::vector<char>* profile) {
   // Called from the FILE thread on Windows and IO thread elsewhere.
 
   // TODO: support multiple monitors.
   CR_DEFINE_STATIC_LOCAL(std::vector<char>, screen_profile, ());
   static bool initialized = false;
 
   profile->clear();
   if (!initialized) {
     initialized = true;
     ReadColorProfile(&screen_profile);
   }
 
   profile->assign(screen_profile.begin(), screen_profile.end());
 }
 
 }  // namespace gfx