Fix up all the easy virtual ... SK_OVERRIDE cases.

bench/ChartBench.cpp

Index: bench/ChartBench.cpp
diff --git a/bench/ChartBench.cpp b/bench/ChartBench.cpp
index 8d05ef179a33a7310eebb136824301af839cd71c..175e1ddfd3be8482859a6aac372119fe08e6a794 100644
--- a/bench/ChartBench.cpp
+++ b/bench/ChartBench.cpp
@@ -94,7 +94,7 @@ public:
     }
 
 protected:
-    virtual const char* onGetName() SK_OVERRIDE {
+    const char* onGetName() SK_OVERRIDE {
         if (fAA) {
             return "chart_aa";
         } else {
@@ -102,7 +102,7 @@ protected:
         }
     }
 
-    virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
         bool sizeChanged = false;
         if (canvas->getDeviceSize() != fSize) {
             fSize = canvas->getDeviceSize();