Cleanup: More override fixes - another round.

BUG=skia:3075
TEST=ninja -C out/Debug
TBR=reed@google.com

Review URL: https://codereview.chromium.org/831113002
diff --git a/src/animator/SkDrawLine.h b/src/animator/SkDrawLine.h
index b287802..5665433 100644
--- a/src/animator/SkDrawLine.h
+++ b/src/animator/SkDrawLine.h
@@ -16,7 +16,7 @@
 class SkLine : public SkBoundable {
     DECLARE_MEMBER_INFO(Line);
     SkLine();
-    virtual bool draw(SkAnimateMaker& );
+    virtual bool draw(SkAnimateMaker& ) SK_OVERRIDE;
 private:
     SkScalar x1;
     SkScalar x2;