remove unused/dumb methods from SkRect

Bug: skia:
Change-Id: I407dc94256a347c7a9343b75a5af43c4294891d3
Reviewed-on: https://skia-review.googlesource.com/119360
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Yuqian Li <liyuqian@google.com>
diff --git a/gm/windowrectangles.cpp b/gm/windowrectangles.cpp
index 931a154..c427b1a 100644
--- a/gm/windowrectangles.cpp
+++ b/gm/windowrectangles.cpp
@@ -277,8 +277,9 @@
 
     canvas->clipRect(SkRect::Make(kCoverRect));
     canvas->clear(SK_ColorWHITE);
-    canvas->drawString(errorMsg, SkIntToScalar(kCoverRect.centerX()),
-                     SkIntToScalar(kCoverRect.centerY() - 10), paint);
+
+    canvas->drawString(errorMsg, SkIntToScalar((kCoverRect.left() + kCoverRect.right())/2),
+                     SkIntToScalar((kCoverRect.top() + kCoverRect.bottom())/2 - 10), paint);
 }
 
 DEF_GM( return new WindowRectanglesMaskGM(); )