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

gm/gammatext.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkCanvas.h"
 #include "SkPath.h"
@@ skipping 120 matching lines @@
 
 public:
     GammaShaderTextGM() {
         const SkColor colors[] = { SK_ColorBLACK, SK_ColorRED, SK_ColorBLUE };
         for (size_t i = 0; i < SK_ARRAY_COUNT(fShaders); ++i) {
             fShaders[i] = NULL;
             fColors[i] = colors[i];
         }
     }
 
-    virtual ~GammaShaderTextGM() SK_OVERRIDE {
+    ~GammaShaderTextGM() SK_OVERRIDE {
         for (size_t i = 0; i < SK_ARRAY_COUNT(fShaders); ++i) {
             SkSafeUnref(fShaders[i]);
         }
     }
 
 protected:
     SkString onShortName() SK_OVERRIDE {
         return SkString("gammagradienttext");
     }
     
@@ skipping 20 matching lines @@
             canvas->translate(0, 80);
         }
     }
     
 private:
     typedef skiagm::GM INHERITED;
 };
 
 DEF_GM( return new GammaShaderTextGM; )