Defining new color constat for transparent color
Review URL: https://codereview.appspot.com/6901044

git-svn-id: http://skia.googlecode.com/svn/trunk@6696 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/arithmode.cpp b/gm/arithmode.cpp
index 6f10dd6..f5e1091 100644
--- a/gm/arithmode.cpp
+++ b/gm/arithmode.cpp
@@ -19,7 +19,7 @@
     SkBitmap bm;
     bm.setConfig(SkBitmap::kARGB_8888_Config, WW, HH);
     bm.allocPixels();
-    bm.eraseColor(0);
+    bm.eraseColor(SK_ColorTRANSPARENT);
     return bm;
 }