gpu: enable FRAMBUFFER_SRGB on desktop

gpu/command_buffer/service/feature_info.h

 // 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
 #define GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
 
 #include <string>
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ skipping 70 matching lines @@
     bool blend_equation_advanced;
     bool blend_equation_advanced_coherent;
     bool ext_texture_rg;
     bool chromium_image_ycbcr_420v;
     bool chromium_image_ycbcr_422;
     bool enable_subscribe_uniform;
     bool emulate_primitive_restart_fixed_index;
     bool ext_render_buffer_format_bgra8888;
     bool ext_multisample_compatibility;
     bool ext_blend_func_extended;
+    bool ext_framebuffer_srgb;
   };
 
   struct Workarounds {
     Workarounds();
 
 #define GPU_OP(type, name) bool name;
     GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
 #undef GPU_OP
 
     // Note: 0 here means use driver limit.
@@ skipping 88 matching lines @@
   bool disable_shader_translator_;
   scoped_ptr<gfx::GLVersionInfo> gl_version_info_;
 
   DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_