Revert of Support for retreiving the monitor color space on X11.

ui/gfx/color_space.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 "build/build_config.h"
 #include "ui/gfx/color_space.h"
 
 namespace gfx {
 
 namespace {
@@ skipping 11 matching lines @@
   return icc_profile_ == other.icc_profile_;
 }
 
 ColorSpace ColorSpace::FromICCProfile(const std::vector<char>& icc_profile) {
   ColorSpace color_space;
   if (IsValidProfileLength(icc_profile.size()))
     color_space.icc_profile_ = icc_profile;
   return color_space;
 }
 
-#if !defined(OS_WIN) && !defined(OS_MACOSX) && !defined(USE_X11)
+#if !defined(OS_WIN) && !defined(OS_MACOSX)
 // static
 ColorSpace ColorSpace::FromBestMonitor() {
   return ColorSpace();
 }
 #endif
 
 // static
 bool ColorSpace::IsValidProfileLength(size_t length) {
   return length >= kMinProfileLength && length <= kMaxProfileLength;
 }
 
 }  // namespace gfx