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

bench/ImageFilterDAGBench.cpp

Index: bench/ImageFilterDAGBench.cpp
diff --git a/bench/ImageFilterDAGBench.cpp b/bench/ImageFilterDAGBench.cpp
index 680628e0e0d6d9ab6b6884acff1c804f5b9cbdb8..0e5d4d1f83ae090a09fd76ed48371b70818e7f08 100644
--- a/bench/ImageFilterDAGBench.cpp
+++ b/bench/ImageFilterDAGBench.cpp
@@ -21,11 +21,11 @@ public:
     ImageFilterDAGBench() {}
 
 protected:
-    virtual const char* onGetName() SK_OVERRIDE {
+    const char* onGetName() SK_OVERRIDE {
         return "image_filter_dag";
     }
 
-    virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
         for (int j = 0; j < loops; j++) {
             SkAutoTUnref<SkImageFilter> blur(SkBlurImageFilter::Create(20.0f, 20.0f));
             SkImageFilter* inputs[kNumInputs];