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/gmmain.cpp b/gm/gmmain.cpp
index 757fa70..316251e 100644
--- a/gm/gmmain.cpp
+++ b/gm/gmmain.cpp
@@ -371,7 +371,7 @@
                              SkBitmap* bitmap) {
         bitmap->setConfig(gRec.fConfig, size.width(), size.height());
         bitmap->allocPixels();
-        bitmap->eraseColor(0);
+        bitmap->eraseColor(SK_ColorTRANSPARENT);
     }
 
     static void installFilter(SkCanvas* canvas) {