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

gm/imagemagnifier.cpp

Index: gm/imagemagnifier.cpp
diff --git a/gm/imagemagnifier.cpp b/gm/imagemagnifier.cpp
index 371b3088f9e57c378e811183cd0745c5910c88b2..feac4c19cf50b2dd9c647f5c08c8b5edd62cb629 100644
--- a/gm/imagemagnifier.cpp
+++ b/gm/imagemagnifier.cpp
@@ -21,20 +21,20 @@ public:
     }
 
 protected:
-    virtual uint32_t onGetFlags() const SK_OVERRIDE {
+    uint32_t onGetFlags() const SK_OVERRIDE {
         // Skip tiled drawing until https://code.google.com/p/skia/issues/detail?id=781 is fixed.
         return this->INHERITED::onGetFlags() | GM::kSkipTiled_Flag;
     }
 
-    virtual SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() SK_OVERRIDE {
         return SkString("imagemagnifier");
     }
 
-    virtual SkISize onISize() SK_OVERRIDE {
+    SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(WIDTH, HEIGHT);
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         SkPaint filterPaint;
         filterPaint.setImageFilter(
             SkMagnifierImageFilter::Create(