Add GrProcOptInfo class to track various output information for color and coverage stages.

gyp/gpu.gypi

 # 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
 #
 {
   'variables': {
     'skgpu_sources': [
@@ skipping 104 matching lines @@
       '<(skia_src_path)/gpu/GrPathRendererChain.cpp',
       '<(skia_src_path)/gpu/GrPathRenderer.cpp',
       '<(skia_src_path)/gpu/GrPathRenderer.h',
       '<(skia_src_path)/gpu/GrPathRendering.cpp',
       '<(skia_src_path)/gpu/GrPathRendering.h',
       '<(skia_src_path)/gpu/GrPathUtils.cpp',
       '<(skia_src_path)/gpu/GrPathUtils.h',
       '<(skia_src_path)/gpu/GrProgramDesc.h',
       '<(skia_src_path)/gpu/GrProgramElement.cpp',
       '<(skia_src_path)/gpu/GrProcessor.cpp',
+      '<(skia_src_path)/gpu/GrProcOptInfo.cpp',
+      '<(skia_src_path)/gpu/GrProcOptInfo.h',
       '<(skia_src_path)/gpu/GrGpuResourceRef.cpp',
       '<(skia_src_path)/gpu/GrPictureUtils.h',
       '<(skia_src_path)/gpu/GrPictureUtils.cpp',
       '<(skia_src_path)/gpu/GrPlotMgr.h',
       '<(skia_src_path)/gpu/GrRecordReplaceDraw.cpp',
       '<(skia_src_path)/gpu/GrRecordReplaceDraw.h',
       '<(skia_src_path)/gpu/GrRectanizer.h',
       '<(skia_src_path)/gpu/GrRectanizer_pow2.cpp',
       '<(skia_src_path)/gpu/GrRectanizer_pow2.h',
       '<(skia_src_path)/gpu/GrRectanizer_skyline.cpp',
@@ skipping 224 matching lines @@
     ],
     'skgpu_null_gl_sources': [
       '<(skia_src_path)/gpu/gl/GrGLCreateNullInterface.cpp',
 
       # Sk files
       '<(skia_include_path)/gpu/gl/SkNullGLContext.h',
       '<(skia_src_path)/gpu/gl/SkNullGLContext.cpp',
     ],
   },
 }