Implement a benchmark for GrResourceCache

bench/MemsetBench.cpp

Index: bench/MemsetBench.cpp
diff --git a/bench/MemsetBench.cpp b/bench/MemsetBench.cpp
index affae2902e2bce3b6a139deac53850d743e7c248..17adf0402aca64654fda400b989dee140484eeeb 100644
--- a/bench/MemsetBench.cpp
+++ b/bench/MemsetBench.cpp
@@ -34,7 +34,10 @@ public:
         fMaxSize = maxSize;
         fName.printf("memset%d_" SK_SIZE_T_SPECIFIER "_" SK_SIZE_T_SPECIFIER,
                      type, minSize, maxSize);
-        fIsRendering = false;
+    }
+
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
     }
 
     virtual void performTest() = 0;