use new globally scoped SkAlphaType

git-svn-id: http://skia.googlecode.com/svn/trunk@11424 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/debugger/QT/SkImageWidget.cpp b/debugger/QT/SkImageWidget.cpp
index d852bf6..cac7e7d 100644
--- a/debugger/QT/SkImageWidget.cpp
+++ b/debugger/QT/SkImageWidget.cpp
@@ -20,7 +20,7 @@
     info.fWidth = kImageWidgetWidth;
     info.fHeight = kImageWidgetHeight;
     info.fColorType = SkImage::kPMColor_ColorType;
-    info.fAlphaType = SkImage::kPremul_AlphaType;
+    info.fAlphaType = kPremul_SkAlphaType;
 
     fSurface = SkSurface::NewRasterDirect(info, fPixels, 4 * kImageWidgetWidth);
 }