gpu: enable FRAMBUFFER_SRGB on desktop

gpu/command_buffer/service/feature_info.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 "gpu/command_buffer/service/feature_info.h"
 
 #include <set>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 159 matching lines @@
       chromium_path_rendering(false),
       blend_equation_advanced(false),
       blend_equation_advanced_coherent(false),
       ext_texture_rg(false),
       chromium_image_ycbcr_420v(false),
       chromium_image_ycbcr_422(false),
       enable_subscribe_uniform(false),
       emulate_primitive_restart_fixed_index(false),
       ext_render_buffer_format_bgra8888(false),
       ext_multisample_compatibility(false),
-      ext_blend_func_extended(false) {}
+      ext_framebuffer_srgb(false) {}
 
 FeatureInfo::Workarounds::Workarounds() :
 #define GPU_OP(type, name) name(false),
     GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
 #undef GPU_OP
     max_texture_size(0),
     max_cube_map_texture_size(0),
     max_fragment_uniform_vectors(0),
     max_varying_vectors(0),
     max_vertex_uniform_vectors(0),
@@ skipping 990 matching lines @@
     validators_.texture_internal_format.AddValue(GL_R8_EXT);
     validators_.texture_internal_format.AddValue(GL_RG_EXT);
     validators_.texture_internal_format.AddValue(GL_RG8_EXT);
     validators_.read_pixel_format.AddValue(GL_RED_EXT);
     validators_.read_pixel_format.AddValue(GL_RG_EXT);
     validators_.render_buffer_format.AddValue(GL_R8_EXT);
     validators_.render_buffer_format.AddValue(GL_RG8_EXT);
   }
   UMA_HISTOGRAM_BOOLEAN("GPU.TextureRG", feature_flags_.ext_texture_rg);
 
+  if (extensions.Contains("GL_ARB_framebuffer_sRGB") ||
+      extensions.Contains("GLX_ARB_framebuffer_sRGB") ||
+      extensions.Contains("WGL_ARB_framebuffer_sRGB")) {
+    feature_flags_.ext_framebuffer_srgb = true;
+    AddExtensionString("GL_ARB_framebuffer_sRGB");
+  }
+
   bool has_opengl_dual_source_blending =
       gl_version_info_->IsAtLeastGL(3, 3) ||
       (gl_version_info_->IsAtLeastGL(3, 2) &&
        extensions.Contains("GL_ARB_blend_func_extended"));
   if (!disable_shader_translator_ &&
       ((gl_version_info_->IsAtLeastGL(3, 2) &&
         has_opengl_dual_source_blending) ||
        (gl_version_info_->IsAtLeastGLES(3, 0) &&
         extensions.Contains("GL_EXT_blend_func_extended")))) {
     // Note: to simplify the code, we do not expose EXT_blend_func_extended
@@ skipping 131 matching lines @@
   if (pos == std::string::npos) {
     extensions_ += (extensions_.empty() ? "" : " ") + str;
   }
 }
 
 FeatureInfo::~FeatureInfo() {
 }
 
 }  // namespace gles2
 }  // namespace gpu