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

src/core/SkBitmapHeap.h

Index: src/core/SkBitmapHeap.h
diff --git a/src/core/SkBitmapHeap.h b/src/core/SkBitmapHeap.h
index 148ae132a4a5b9ddaf7ff5a65763a39e23a7aeab..95e272418ae26d0de5ce58e59271c59409565ba2 100644
--- a/src/core/SkBitmapHeap.h
+++ b/src/core/SkBitmapHeap.h
@@ -117,7 +117,7 @@ public:
      *
      * @return  The bitmap located at that slot or NULL if external storage is being used.
      */
-    virtual SkBitmap* getBitmap(int32_t slot) const SK_OVERRIDE {
+    SkBitmap* getBitmap(int32_t slot) const SK_OVERRIDE {
         SkASSERT(fExternalStorage == NULL);
         SkBitmapHeapEntry* entry = getEntry(slot);
         if (entry) {
@@ -131,7 +131,7 @@ public:
      *
      * @return  The bitmap located at that slot or NULL if external storage is being used.
      */
-    virtual void releaseRef(int32_t slot) SK_OVERRIDE {
+    void releaseRef(int32_t slot) SK_OVERRIDE {
         SkASSERT(fExternalStorage == NULL);
         if (fOwnerCount != IGNORE_OWNERS) {
             SkBitmapHeapEntry* entry = getEntry(slot);