C++11 override should now be supported by all of {bots,Chrome,Android,Mozilla}

site/dev/contrib/flatten.md

 Flattenables
 ============
 
 Many objects in Skia, such as SkShaders and other effects on SkPaint, need to be 
 flattened into a data stream for either transport or as part of the key to the 
 font cache. Classes for these objects should derive from SkFlattenable or one of 
 its subclasses. If you create a new flattenable class, you need to make sure you 
 do a few things so that it will work on all platforms:
 
 1: Override the method flatten (the default scope is protected):
 
 <!--?prettify?-->
 ~~~~
-virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE {
+virtual void flatten(SkFlattenableWriteBuffer& buffer) const override {
     this->INHERITED::flatten(buffer);
     // Write any private data that needs to be stored to recreate this object
 }
 ~~~~
 
 2: Override the (protected) constructor that creates an object from an 
 SkFlattenableReadBuffer:
 
 <!--?prettify?-->
 ~~~~
@@ skipping 54 matching lines @@
 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkNewClass)
 ~~~~
 
 For a group, add
 
 <!--?prettify?-->
 ~~~~
 SkGroupClass::InitializeFlattenables();
 ~~~~