Implement a benchmark for GrResourceCache

bench/Matrix44Bench.cpp

Index: bench/Matrix44Bench.cpp
diff --git a/bench/Matrix44Bench.cpp b/bench/Matrix44Bench.cpp
index 13169971c45b032e59651f5a48f7a4d813234166..7c0c0deb92dedd4e97dd3d4cc512662a086458da 100644
--- a/bench/Matrix44Bench.cpp
+++ b/bench/Matrix44Bench.cpp
@@ -15,7 +15,10 @@ class Matrix44Bench : public SkBenchmark {
 public:
     Matrix44Bench(const char name[]) {
         fName.printf("matrix44_%s", name);
-        fIsRendering = false;
+    }
+
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
     }
 
     virtual void performTest() = 0;