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

src/core/SkBuffer.h

Index: src/core/SkBuffer.h
diff --git a/src/core/SkBuffer.h b/src/core/SkBuffer.h
index 9791cf55a14a8c5bfde23d7a28effc9d3988f047..96e225be3a423c8f5c30e98f67e56f59ad25c9c3 100644
--- a/src/core/SkBuffer.h
+++ b/src/core/SkBuffer.h
@@ -105,7 +105,7 @@ public:
         null and the number of bytes to read does not overflow this object's data,
         copy those bytes into buffer.
     */
-    virtual bool read(void* buffer, size_t size) SK_OVERRIDE;
+    bool read(void* buffer, size_t size) SK_OVERRIDE;
 
     /** Returns whether or not a read operation attempted to read past the end of the data.
     */