Add visualbench option for device-independent fonts

tools/VisualBench/VisualBenchmarkStream.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  */
 
 #ifndef VisualBenchmarkStream_DEFINED
 #define VisualBenchmarkStream_DEFINED
 
 #include "Benchmark.h"
 #include "gm.h"
 #include "SkCommandLineFlags.h"
 #include "SkPicture.h"
 
 DECLARE_string(match);
 
 class VisualBenchmarkStream {
 public:
-    VisualBenchmarkStream();
+    VisualBenchmarkStream(const SkSurfaceProps&);
 
     static bool ReadPicture(const char* path, SkAutoTUnref<SkPicture>* pic);
 
     Benchmark* next();
     Benchmark* current() { return fBenchmark.get(); }
 
 private:
     Benchmark* innerNext();
 
+    SkSurfaceProps fSurfaceProps;
     const BenchRegistry* fBenches;
     const skiagm::GMRegistry* fGMs;
     SkTArray<SkString> fSKPs;
     SkAutoTUnref<Benchmark> fBenchmark;
 
     const char* fSourceType;  // What we're benching: bench, GM, SKP, ...
     const char* fBenchType;   // How we bench it: micro, playback, ...
     int fCurrentSKP;
     bool fIsWarmedUp;
 };
 
 #endif