Implement a benchmark for GrResourceCache

bench/ImageDecodeBench.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBenchmark.h"
 #include "SkBitmap.h"
 #include "SkData.h"
 #include "SkForceLinking.h"
 #include "SkImageDecoder.h"
 #include "SkOSFile.h"
 #include "SkStream.h"
 #include "SkString.h"
 
 __SK_FORCE_IMAGE_DECODER_LINKING;
 
 class SkCanvas;
 
 class ImageDecodeBench : public SkBenchmark {
 public:
     ImageDecodeBench(void* p, const char* filename)
     : fName("image_decode_")
     , fFilename(filename)
     , fStream()
     , fValid(false) {
         fName.append(SkOSPath::SkBasename(filename));
-        fIsRendering = false;
+    }
+
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
     }
 
 protected:
     virtual const char* onGetName() SK_OVERRIDE {
         return fName.c_str();
     }
 
     virtual void onPreDraw() SK_OVERRIDE {
         SkFILEStream fileStream(fFilename.c_str());
         fValid = fileStream.isValid() && fileStream.getLength() > 0;
@@ skipping 41 matching lines @@
     const SkString  fFilename;
     SkMemoryStream  fStream;
     bool            fValid;
 
     typedef SkBenchmark INHERITED;
 };
 
 // These are files which call decodePalette
 //DEF_BENCH( return SkNEW_ARGS(ImageDecodeBench, ("/usr/local/google/home/scroggo/Downloads/images/hal_163x90.png")); )
 //DEF_BENCH( return SkNEW_ARGS(ImageDecodeBench, ("/usr/local/google/home/scroggo/Downloads/images/box_19_top-left.png")); )