Added --deepColor option to SampleApp, triggers creation of a ten-bit/channel buffer on Windows.

gyp/gpu.gypi

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 # Include this gypi to include all 'gpu' files
 # The parent gyp/gypi file must define
 #       'skia_src_path'     e.g. skia/trunk/src
 #       'skia_include_path' e.g. skia/trunk/include
 #
 # The skia build defines these in common_variables.gypi
@@ skipping 267 matching lines @@
       '<(skia_src_path)/gpu/effects/GrBitmapTextGeoProc.cpp',
       '<(skia_src_path)/gpu/effects/GrBitmapTextGeoProc.h',
       '<(skia_src_path)/gpu/effects/GrDashingEffect.cpp',
       '<(skia_src_path)/gpu/effects/GrDashingEffect.h',
       '<(skia_src_path)/gpu/effects/GrDisableColorXP.cpp',
       '<(skia_src_path)/gpu/effects/GrDisableColorXP.h',
       '<(skia_src_path)/gpu/effects/GrDistanceFieldGeoProc.cpp',
       '<(skia_src_path)/gpu/effects/GrDistanceFieldGeoProc.h',
       '<(skia_src_path)/gpu/effects/GrDitherEffect.cpp',
       '<(skia_src_path)/gpu/effects/GrDitherEffect.h',
+      '<(skia_src_path)/gpu/effects/GrGammaEffect.cpp',
+      '<(skia_src_path)/gpu/effects/GrGammaEffect.h',
       '<(skia_src_path)/gpu/effects/GrMatrixConvolutionEffect.cpp',
       '<(skia_src_path)/gpu/effects/GrMatrixConvolutionEffect.h',
       '<(skia_src_path)/gpu/effects/GrOvalEffect.cpp',
       '<(skia_src_path)/gpu/effects/GrOvalEffect.h',
       '<(skia_src_path)/gpu/effects/GrPorterDuffXferProcessor.cpp',
       '<(skia_src_path)/gpu/effects/GrRRectEffect.cpp',
       '<(skia_src_path)/gpu/effects/GrRRectEffect.h',
       '<(skia_src_path)/gpu/effects/GrSimpleTextureEffect.cpp',
       '<(skia_src_path)/gpu/effects/GrSimpleTextureEffect.h',
       '<(skia_src_path)/gpu/effects/GrSingleTextureEffect.cpp',
@@ skipping 213 matching lines @@
       '<(skia_src_path)/gpu/gl/win/GrGLCreateNativeInterface_win.cpp',
       '<(skia_src_path)/gpu/gl/glx/GrGLCreateNativeInterface_glx.cpp',
       '<(skia_src_path)/gpu/gl/egl/GrGLCreateNativeInterface_egl.cpp',
       '<(skia_src_path)/gpu/gl/iOS/GrGLCreateNativeInterface_iOS.cpp',
       '<(skia_src_path)/gpu/gl/android/GrGLCreateNativeInterface_android.cpp',
     ],
     'skgpu_null_gl_sources': [
     ],
   },
 }