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

src/gpu/gl/GrGLIndexBuffer.h

Index: src/gpu/gl/GrGLIndexBuffer.h
diff --git a/src/gpu/gl/GrGLIndexBuffer.h b/src/gpu/gl/GrGLIndexBuffer.h
index 0eb10bb662898c45e5674ed75b39973bfb4d4957..3ff746e29787b021cf74563616d7fb8b908d9570 100644
--- a/src/gpu/gl/GrGLIndexBuffer.h
+++ b/src/gpu/gl/GrGLIndexBuffer.h
@@ -31,13 +31,13 @@ public:
     }
 
 protected:
-    virtual void onAbandon() SK_OVERRIDE;
-    virtual void onRelease() SK_OVERRIDE;
+    void onAbandon() SK_OVERRIDE;
+    void onRelease() SK_OVERRIDE;
 
 private:
-    virtual void* onMap() SK_OVERRIDE;
-    virtual void onUnmap() SK_OVERRIDE;
-    virtual bool onUpdateData(const void* src, size_t srcSizeInBytes) SK_OVERRIDE;
+    void* onMap() SK_OVERRIDE;
+    void onUnmap() SK_OVERRIDE;
+    bool onUpdateData(const void* src, size_t srcSizeInBytes) SK_OVERRIDE;
 
     GrGLGpu* getGpuGL() const {
         SkASSERT(!this->wasDestroyed());