Implement a benchmark for GrResourceCache

bench/PathBench.cpp

Index: bench/PathBench.cpp
diff --git a/bench/PathBench.cpp b/bench/PathBench.cpp
index 11151d9d45329e4bdfcbb40cbb49997ec85dbf7e..ab68c092301b3c5037a4173b54024a7ce32c4915 100644
--- a/bench/PathBench.cpp
+++ b/bench/PathBench.cpp
@@ -217,7 +217,10 @@ private:
 class RandomPathBench : public SkBenchmark {
 public:
     RandomPathBench()  {
-        fIsRendering = false;
+    }
+
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
     }
 
 protected:
@@ -761,7 +764,6 @@ public:
     };
 
     ConservativelyContainsBench(Type type)  {
-        fIsRendering = false;
         fParity = false;
         fName = "conservatively_contains_";
         switch (type) {
@@ -780,6 +782,10 @@ public:
         }
     }
 
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
+    }
+
 private:
     virtual const char* onGetName() SK_OVERRIDE {
         return fName.c_str();
@@ -903,7 +909,10 @@ public:
         for (int i = 0; i < CONICS; ++i) {
             rand_conic(&fConics[i], rand);
         }
-        fIsRendering = false;
+    }
+
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
     }
 
 protected: