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/samplecode/SamplePageFlip.cpp b/samplecode/SamplePageFlip.cpp
index 7daeb1b..1020189 100644
--- a/samplecode/SamplePageFlip.cpp
+++ b/samplecode/SamplePageFlip.cpp
@@ -120,7 +120,7 @@
             fBitmaps[i].setConfig(gConfigs[i], WIDTH, HEIGHT);
             SkFlipPixelRef* pr = new SkFlipPixelRef(gConfigs[i], WIDTH, HEIGHT);
             fBitmaps[i].setPixelRef(pr)->unref();
-            fBitmaps[i].eraseColor(0);
+            fBitmaps[i].eraseColor(SK_ColorTRANSPARENT);
 
             status = pthread_create(&fThreads[i], &attr,  draw_proc, &fBitmaps[i]);
             SkASSERT(0 == status);