Began logging more gpu stats from nanobench

bench/ResultsWriter.h

Index: bench/ResultsWriter.h
diff --git a/bench/ResultsWriter.h b/bench/ResultsWriter.h
index 2906429bf0acc6fb74ab25152476a111343d32f7..bf74d47826cca1243b8eb5eb01df361781f2674f 100644
--- a/bench/ResultsWriter.h
+++ b/bench/ResultsWriter.h
@@ -87,26 +87,26 @@ public:
     }
 
     // Added under "key".
-    virtual void key(const char name[], const char value[]) {
+    void key(const char name[], const char value[]) override {
         fRoot["key"][name] = value;
     }
     // Inserted directly into the root.
-    virtual void property(const char name[], const char value[]) {
+    void property(const char name[], const char value[]) override {
         fRoot[name] = value;
     }
-    virtual void bench(const char name[], int32_t x, int32_t y) {
+    void bench(const char name[], int32_t x, int32_t y) override {
         SkString id = SkStringPrintf( "%s_%d_%d", name, x, y);
         fResults[id.c_str()] = Json::Value(Json::objectValue);
         fBench = &fResults[id.c_str()];
     }
-    virtual void config(const char name[]) {
+    void config(const char name[]) override {
         SkASSERT(fBench);
         fConfig = &(*fBench)[name];
     }
-    virtual void configOption(const char name[], const char* value) {
+    void configOption(const char name[], const char* value) override {
         (*fConfig)["options"][name] = value;
     }
-    virtual void metric(const char name[], double ms) {
+    void metric(const char name[], double ms) override {
         // Don't record if nan, or -nan.
         if (sk_double_isnan(ms)) {
             return;
@@ -116,7 +116,7 @@ public:
     }
 
     // Flush to storage now please.
-    virtual void flush() {
+    void flush() override {
         SkString dirname = SkOSPath::Dirname(fFilename.c_str());
         if (!sk_exists(dirname.c_str(), kWrite_SkFILE_Flag)) {
             if (!sk_mkdir(dirname.c_str())) {