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

src/effects/gradients/SkSweepGradient.cpp

Index: src/effects/gradients/SkSweepGradient.cpp
diff --git a/src/effects/gradients/SkSweepGradient.cpp b/src/effects/gradients/SkSweepGradient.cpp
index bcb2b0dc9e0d9681eb5d05d3b42fa1f073d7c9fc..f8ee4583465b1bb758d40bfbaaebb25ef0df07b3 100644
--- a/src/effects/gradients/SkSweepGradient.cpp
+++ b/src/effects/gradients/SkSweepGradient.cpp
@@ -217,14 +217,14 @@ public:
     }
     virtual ~GrSweepGradient() { }
 
-    virtual const char* name() const SK_OVERRIDE { return "Sweep Gradient"; }
+    const char* name() const SK_OVERRIDE { return "Sweep Gradient"; }
 
     virtual void getGLProcessorKey(const GrGLCaps& caps,
                                    GrProcessorKeyBuilder* b) const SK_OVERRIDE {
         GrGLSweepGradient::GenKey(*this, caps, b);
     }
 
-    virtual GrGLFragmentProcessor* createGLInstance() const SK_OVERRIDE {
+    GrGLFragmentProcessor* createGLInstance() const SK_OVERRIDE {
         return SkNEW_ARGS(GrGLSweepGradient, (*this));
     }