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

samplecode/SampleAll.cpp

Index: samplecode/SampleAll.cpp
diff --git a/samplecode/SampleAll.cpp b/samplecode/SampleAll.cpp
index f5a7c143f4e3b8e36bbe4d147c9b8ff150306891..537659e0e612d3b6b69893bcbeb74b3d62340f9c 100644
--- a/samplecode/SampleAll.cpp
+++ b/samplecode/SampleAll.cpp
@@ -168,11 +168,11 @@ public:
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(Dot2DPathEffect)
 
 protected:
-    virtual void next(const SkPoint& loc, int u, int v, SkPath* dst) const SK_OVERRIDE {
+    void next(const SkPoint& loc, int u, int v, SkPath* dst) const SK_OVERRIDE {
         dst->addCircle(loc.fX, loc.fY, fRadius);
     }
 
-    virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE {
+    void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE {
         this->INHERITED::flatten(buffer);
         buffer.writeScalar(fRadius);
     }