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/imagefiltersbase.cpp b/gm/imagefiltersbase.cpp
index 7f8aeaf..c7f043e 100644
--- a/gm/imagefiltersbase.cpp
+++ b/gm/imagefiltersbase.cpp
@@ -116,7 +116,7 @@
     SkBitmap bm;
     bm.setConfig(SkBitmap::kARGB_8888_Config, bounds.width(), bounds.height());
     bm.allocPixels();
-    bm.eraseColor(0);
+    bm.eraseColor(SK_ColorTRANSPARENT);
     SkCanvas c(bm);
     draw_path(&c, r, NULL);
 
@@ -133,7 +133,7 @@
     SkBitmap bm;
     bm.setConfig(SkBitmap::kARGB_8888_Config, bounds.width(), bounds.height());
     bm.allocPixels();
-    bm.eraseColor(0);
+    bm.eraseColor(SK_ColorTRANSPARENT);
     SkCanvas c(bm);
     draw_path(&c, r, NULL);