Adding support for parsing extended gpu config parameters in nanobench.

bench/nanobench.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 nanobench_DEFINED
 #define nanobench_DEFINED
 
 #include "Benchmark.h"
 #include "SkImageInfo.h"
 #include "SkSurface.h"
 #include "SkTypes.h"
 
 #if SK_SUPPORT_GPU
 #include "GrContextFactory.h"
 #endif
 
 class ResultsWriter;
 class SkBitmap;
 class SkCanvas;
 
 struct Config {
-    const char* name;
+    SkString name;
     Benchmark::Backend backend;
     SkColorType color;
     SkAlphaType alpha;
     int samples;
 #if SK_SUPPORT_GPU
     GrContextFactory::GLContextType ctxType;
     GrContextFactory::GLContextOptions ctxOptions;
     bool useDFText;
 #else
     int bogusInt;
@@ skipping 44 matching lines @@
 
     SkCanvas* getCanvas() const {
         if (!surface.get()) {
             return nullptr;
         }
         return surface->getCanvas();
     }
 };
 
 #endif  // nanobench_DEFINED