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

gm/lerpmode.cpp

Index: gm/lerpmode.cpp
diff --git a/gm/lerpmode.cpp b/gm/lerpmode.cpp
index 30e6abd523fa92582e298046fa882ec9c396e3db..7b567a24a41a747ced748b698d3485b0e83e37f2 100644
--- a/gm/lerpmode.cpp
+++ b/gm/lerpmode.cpp
@@ -39,15 +39,15 @@ public:
     LerpXfermodeGM() {}
 
 protected:
-    virtual SkString onShortName() SK_OVERRIDE {
+    SkString onShortName() SK_OVERRIDE {
         return SkString("lerpmode");
     }
 
-    virtual SkISize onISize() SK_OVERRIDE {
+    SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(240, 120);
     }
 
-    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         show_circlelayers(canvas, NULL);
         canvas->translate(150, 0);
         SkAutoTUnref<SkXfermode> mode(SkLerpXfermode::Create(0.5f));