Turn on FRAMEBUFFER_SRGB on desktop GL.

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index affed33b0e82a8399fc076eb5e414d73e347da4a..290410cdfaecf3eb31bc86f5bb62c298c512f9a9 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -3034,6 +3034,10 @@ bool GLES2DecoderImpl::Initialize(const scoped_refptr<gfx::GLSurface>& surface,
     glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);
   }
 
+  if (feature_info_->gl_version_info().IsAtLeastGL(3, 2)) {

[Ken Russell (switch to Gerrit), 2016/04/14 00:18:23]

Could you add a comment here describing the effect?

[Zhenyao Mo, 2016/04/14 00:26:29]

Done.

+    glEnable(GL_FRAMEBUFFER_SRGB);
+  }
+
   has_robustness_extension_ =
       context->HasExtension("GL_ARB_robustness") ||
       context->HasExtension("GL_KHR_robustness") ||