Remove SkSurfaceProps gamma-correctness flag entirely.

dm/DMGpuSupport.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef DMGpuSupport_DEFINED
 #define DMGpuSupport_DEFINED
 
@@ skipping 18 matching lines @@
 static const bool kGPUDisabled = false;
 
 static inline sk_sp<SkSurface> NewGpuSurface(
         sk_gpu_test::GrContextFactory* grFactory,
         sk_gpu_test::GrContextFactory::ContextType type,
         sk_gpu_test::GrContextFactory::ContextOptions options,
         SkImageInfo info,
         int samples,
         bool useDIText) {
     uint32_t flags = useDIText ? SkSurfaceProps::kUseDeviceIndependentFonts_Flag : 0;
-    if (SkImageInfoIsGammaCorrect(info)) {
-        flags |= SkSurfaceProps::kGammaCorrect_Flag;
-    }
     SkSurfaceProps props(flags, SkSurfaceProps::kLegacyFontHost_InitType);
     return SkSurface::MakeRenderTarget(grFactory->get(type, options), SkBudgeted::kNo,
                                        info, samples, &props);
 }
 
 }  // namespace DM
 
 #else// !SK_SUPPORT_GPU
 
 // Ganesh is not available.  Fake it.
@@ skipping 54 matching lines @@
                                        int,
                                        bool) {
     return nullptr;
 }
 
 }  // namespace DM
 
 #endif//SK_SUPPORT_GPU
 
 #endif//DMGpuSupport_DEFINED