promote SkImage::AlphaType to SkAlphaType

BUG=
R=bsalomon@google.com

Review URL: https://codereview.chromium.org/24130009

git-svn-id: http://skia.googlecode.com/svn/trunk@11421 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/DrawPathTest.cpp b/tests/DrawPathTest.cpp
index 9f440f6..40f4a04 100644
--- a/tests/DrawPathTest.cpp
+++ b/tests/DrawPathTest.cpp
@@ -36,10 +36,7 @@
     output.setConfig(SkBitmap::kARGB_8888_Config, 1, 1, 4);
     output.setPixels(pixel);
 
-    SkImage::Info info = {
-        300, 33300, SkImage::kPMColor_ColorType, SkImage::kPremul_AlphaType
-    };
-    SkSurface* surf = SkSurface::NewRaster(info);
+    SkSurface* surf = SkSurface::NewRasterPMColor(300, 33300);
     SkCanvas* canvas = surf->getCanvas();
 
     SkRect r = { 0, 33000, 300, 33300 };