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

src/images/SkImageDecoder_libbmp.cpp

Index: src/images/SkImageDecoder_libbmp.cpp
diff --git a/src/images/SkImageDecoder_libbmp.cpp b/src/images/SkImageDecoder_libbmp.cpp
index af868e30a72cd41708aefa61a31d4644ea722747..e28713d8a6d94687fc88fd268bbe529e55aadd19 100644
--- a/src/images/SkImageDecoder_libbmp.cpp
+++ b/src/images/SkImageDecoder_libbmp.cpp
@@ -19,12 +19,12 @@ class SkBMPImageDecoder : public SkImageDecoder {
 public:
     SkBMPImageDecoder() {}
 
-    virtual Format getFormat() const SK_OVERRIDE {
+    Format getFormat() const SK_OVERRIDE {
         return kBMP_Format;
     }
 
 protected:
-    virtual Result onDecode(SkStream* stream, SkBitmap* bm, Mode mode) SK_OVERRIDE;
+    Result onDecode(SkStream* stream, SkBitmap* bm, Mode mode) SK_OVERRIDE;
 
 private:
     typedef SkImageDecoder INHERITED;