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

bench/CoverageBench.cpp

Index: bench/CoverageBench.cpp
diff --git a/bench/CoverageBench.cpp b/bench/CoverageBench.cpp
index ecb0ee6fa7c7bf278ae18ad4f73a0ab31e009ac5..097a9e1b28106724b316faff2de9687a5610c717 100644
--- a/bench/CoverageBench.cpp
+++ b/bench/CoverageBench.cpp
@@ -44,11 +44,11 @@ public:
     }
 
 protected:
-    virtual const char* onGetName() SK_OVERRIDE {
+    const char* onGetName() SK_OVERRIDE {
         return fName.c_str();
     }
 
-    virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
         if (fDrawCoverage) {
             for (int i = 0; i < loops; ++i) {
                 fDraw.drawPathCoverage(fPath, fPaint);