Implement a benchmark for GrResourceCache

bench/RegionContainBench.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 "SkRandom.h"
 #include "SkRegion.h"
@@ skipping 25 matching lines @@
     RegionContainBench(Proc proc, const char name[])  {
         fProc = proc;
         fName.printf("region_contains_%s", name);
 
         SkRandom rand;
         for (int i = 0; i < COUNT; i++) {
             fA.op(randrect(rand, i), SkRegion::kXOR_Op);
         }
 
         fB.setRect(0, 0, H, W);
+    }
 
-        fIsRendering = false;
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
     }
 
 protected:
     virtual const char* onGetName() { return fName.c_str(); }
 
     virtual void onDraw(SkCanvas*) {
         Proc proc = fProc;
 
         for (int i = 0; i < this->getLoops(); ++i) {
            proc(fA, fB);
         }
     }
 
 private:
     typedef SkBenchmark INHERITED;
 };
 
 DEF_BENCH( return SkNEW_ARGS(RegionContainBench, (sect_proc, "sect")); )