Enable gpusrgb config on bots.

src/gpu/GrContextFactory.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrContextFactory.h"
 
 #if SK_ANGLE
@@ skipping 130 matching lines @@
     grCtx.reset(GrContext::Create(kOpenGL_GrBackend, p3dctx, fGlobalOptions));
 #endif
     if (!grCtx.get()) {
         return ContextInfo();
     }
     if (kEnableNVPR_GLContextOptions & options) {
         if (!grCtx->caps()->shaderCaps()->pathRenderingSupport()) {
             return ContextInfo();
         }
     }
+    if (kRequireSRGBSupport_GLContextOptions & options) {
+        if (!grCtx->caps()->srgbSupport()) {
+            return ContextInfo();
+        }
+    }
 
     Context& context = fContexts.push_back();
     context.fGLContext = glCtx.release();
     context.fGrContext = SkRef(grCtx.get());
     context.fType = type;
     context.fOptions = options;
     return ContextInfo(context.fGrContext, context.fGLContext);
 }