Add GrAASmallPathRenderer.

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 30 matching lines @@
       '<(skia_include_path)/gpu/gl/GrGLConfig.h',
       '<(skia_include_path)/gpu/gl/GrGLExtensions.h',
       '<(skia_include_path)/gpu/gl/GrGLFunctions.h',
       '<(skia_include_path)/gpu/gl/GrGLInterface.h',
       '<(skia_include_path)/gpu/gl/GrGLSLPrettyPrint.h',
 
       '<(skia_src_path)/gpu/GrAAHairLinePathRenderer.cpp',
       '<(skia_src_path)/gpu/GrAAHairLinePathRenderer.h',
       '<(skia_src_path)/gpu/GrAAConvexPathRenderer.cpp',
       '<(skia_src_path)/gpu/GrAAConvexPathRenderer.h',
+      '<(skia_src_path)/gpu/GrAADistanceFieldPathRenderer.cpp',
+      '<(skia_src_path)/gpu/GrAADistanceFieldPathRenderer.h',
       '<(skia_src_path)/gpu/GrAARectRenderer.cpp',
       '<(skia_src_path)/gpu/GrAARectRenderer.h',
       '<(skia_src_path)/gpu/GrAddPathRenderers_default.cpp',
       '<(skia_src_path)/gpu/GrAllocator.h',
       '<(skia_src_path)/gpu/GrAllocPool.h',
       '<(skia_src_path)/gpu/GrAllocPool.cpp',
       '<(skia_src_path)/gpu/GrAtlas.cpp',
       '<(skia_src_path)/gpu/GrAtlas.h',
       '<(skia_src_path)/gpu/GrBitmapTextContext.cpp',
       '<(skia_src_path)/gpu/GrBitmapTextContext.h',
@@ skipping 289 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',
     ],
   },
 }