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

src/core/SkPictureShader.cpp

Index: src/core/SkPictureShader.cpp
diff --git a/src/core/SkPictureShader.cpp b/src/core/SkPictureShader.cpp
index b602294a096f88a263e4ff542452fafabb06623c..5a1e61849df05b81afe0dcc2dddc227aa7ebc6b1 100644
--- a/src/core/SkPictureShader.cpp
+++ b/src/core/SkPictureShader.cpp
@@ -70,8 +70,8 @@ struct BitmapShaderRec : public SkResourceCache::Rec {
     SkAutoTUnref<SkShader> fShader;
     size_t                 fBitmapBytes;
 
-    virtual const Key& getKey() const SK_OVERRIDE { return fKey; }
-    virtual size_t bytesUsed() const SK_OVERRIDE {
+    const Key& getKey() const SK_OVERRIDE { return fKey; }
+    size_t bytesUsed() const SK_OVERRIDE {
         return sizeof(fKey) + sizeof(SkShader) + fBitmapBytes;
     }