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

gm/gmmain.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.
  */
 
 /*
  * Code for the "gm" (Golden Master) rendering comparison tool.
  *
@@ skipping 156 matching lines @@
 };
 
 struct PDFRasterizerData {
     bool        (*fRasterizerFunction)(SkStream*, SkBitmap*);
     const char* fName;
     bool        fRunByDefault;
 };
 
 class BWTextDrawFilter : public SkDrawFilter {
 public:
-    virtual bool filter(SkPaint*, Type) SK_OVERRIDE;
+    bool filter(SkPaint*, Type) SK_OVERRIDE;
 };
 bool BWTextDrawFilter::filter(SkPaint* p, Type t) {
     if (kText_Type == t) {
         p->setAntiAlias(false);
     }
     return true;
 }
 
 struct PipeFlagComboData {
     const char* name;
@@ skipping 2352 matching lines @@
     if (FLAGS_forceBWtext) {
         canvas->setDrawFilter(SkNEW(BWTextDrawFilter))->unref();
     }
 }
 
 #if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif