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/gm/bitmapscroll.cpp b/gm/bitmapscroll.cpp
index d38cbbe..dff5226 100644
--- a/gm/bitmapscroll.cpp
+++ b/gm/bitmapscroll.cpp
@@ -59,7 +59,7 @@
     }
 
 protected:
-    virtual SkString onShortName() {
+    virtual SkString onShortName() SK_OVERRIDE {
         return SkString("bitmapscroll");
     }
 
@@ -67,11 +67,11 @@
         return kSkipTiled_Flag;
     }
 
-    virtual SkISize onISize() {
+    virtual SkISize onISize() SK_OVERRIDE {
       return SkISize::Make(800, 600);
     }
 
-    virtual void onDraw(SkCanvas* canvas) {
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         this->init();
         SkIRect scrollCenterRegion = SkIRect::MakeXYWH(
             quarterWidth, quarterHeight, quarterWidth*2+1, quarterHeight*2+1);