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

gm/samplerstress.cpp

Index: gm/samplerstress.cpp
diff --git a/gm/samplerstress.cpp b/gm/samplerstress.cpp
index fc7d76c56987e4b13faaac54620cb34ad9b4068e..51dfde2d92b3172f704b660d1a9f9696fc99a65a 100644
--- a/gm/samplerstress.cpp
+++ b/gm/samplerstress.cpp
@@ -28,15 +28,15 @@ public:
     }
 
 protected:
-    virtual uint32_t onGetFlags() const SK_OVERRIDE {
+    uint32_t onGetFlags() const SK_OVERRIDE {
         return kSkipTiled_Flag;
     }
 
-    virtual SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() SK_OVERRIDE {
         return SkString("gpusamplerstress");
     }
 
-    virtual SkISize onISize() SK_OVERRIDE {
+    SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(640, 480);
     }
 
@@ -91,7 +91,7 @@ protected:
         fMaskFilter.reset(SkBlurMaskFilter::Create(kNormal_SkBlurStyle, sigma));
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         createShader();
         createMaskFilter();