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

src/gpu/gl/iOS/SkCreatePlatformGLContext_iOS.mm

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gl/SkGLContext.h"
 #import <OpenGLES/EAGL.h>
 
 #define EAGLCTX ((EAGLContext*)(fEAGLContext))
 
 namespace {
 
 class IOSGLContext : public SkGLContext {
 public:
     IOSGLContext();
-    virtual ~IOSGLContext() SK_OVERRIDE;
-    virtual void makeCurrent() const SK_OVERRIDE;
-    virtual void swapBuffers() const SK_OVERRIDE;
+    ~IOSGLContext() SK_OVERRIDE;
+    void makeCurrent() const SK_OVERRIDE;
+    void swapBuffers() const SK_OVERRIDE;
 
 private:
     void destroyGLContext();
 
     void* fEAGLContext;
 };
 
 IOSGLContext::IOSGLContext()
     : fEAGLContext(NULL) {
 
@@ skipping 44 matching lines @@
         return NULL;
     }
     IOSGLContext* ctx = SkNEW(IOSGLContext);
     if (!ctx->isValid()) {
         SkDELETE(ctx);
         return NULL;
     }
     return ctx;
 }