Remove GrRefCnt.h in favor of SkRefCnt.h

gyp/public_headers.gypi

 # Include this gypi to include all public header files that exist in the
 # include directory.
 #
 # The list is computed by running 'find include -name *.h' in the root dir of
 # the project.
 #
 {
   'variables': {
     'header_filenames': [
       'pdf/SkPDFDevice.h',
@@ skipping 16 matching lines @@
       'gpu/gl/GrGLConfig.h',
       'gpu/gl/GrGLInterface.h',
       'gpu/gl/SkNullGLContext.h',
       'gpu/gl/GrGLFunctions.h',
       'gpu/gl/SkGLContextHelper.h',
       'gpu/gl/GrGLExtensions.h',
       'gpu/SkGpuDevice.h',
       'gpu/GrTypes.h',
       'gpu/GrFontScaler.h',
       'gpu/GrResource.h',
-      'gpu/GrRefCnt.h',
       'gpu/GrKey.h',
       'gpu/GrOvalRenderer.h',
       'gpu/GrEffectUnitTest.h',
       'gpu/GrConfig.h',
       'gpu/GrPaint.h',
       'gpu/GrPathRendererChain.h',
       'gpu/GrTBackendEffectFactory.h',
       'gpu/GrDrawEffect.h',
       'gpu/GrTextContext.h',
       'gpu/GrEffect.h',
@@ skipping 259 matching lines @@
       'lazy/SkLruImageCache.h',
     ],
   },
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: