added basic dataflow analysis to skslc

gyp/skia_sources.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 'utils' 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 106 matching lines @@
     '../src/fonts/SkTestScalerContext.cpp',
     '../src/fonts/SkTestScalerContext.h',
   ],
   'sksl_include_dirs': [
     '../include/config',
     '../include/core',
     '../include/private',
     '../src/sksl',
   ],
   'sksl_sources': [
+    '../src/sksl/SkSLCFGGenerator.cpp',
     '../src/sksl/SkSLCompiler.cpp',
     '../src/sksl/SkSLIRGenerator.cpp',
     '../src/sksl/SkSLParser.cpp',
     '../src/sksl/SkSLGLSLCodeGenerator.cpp',
     '../src/sksl/SkSLSPIRVCodeGenerator.cpp',
     '../src/sksl/SkSLUtil.cpp',
     '../src/sksl/ir/SkSLSymbolTable.cpp',
     '../src/sksl/ir/SkSLType.cpp',
   ],
 }