promote SkImage::AlphaType to SkAlphaType

tests/DeferredCanvasTest.cpp

Index: tests/DeferredCanvasTest.cpp
diff --git a/tests/DeferredCanvasTest.cpp b/tests/DeferredCanvasTest.cpp
index 7593ba877ccd611f74f498e0928056b4e0ea4632..e8075bd68fb10daf9f2ac6ed1fbcf0563284079e 100644
--- a/tests/DeferredCanvasTest.cpp
+++ b/tests/DeferredCanvasTest.cpp
@@ -696,7 +696,7 @@ static void TestDeferredCanvasSurface(skiatest::Reporter* reporter, GrContextFac
         10,  // width
         10,  // height
         SkImage::kPMColor_ColorType,
-        SkImage::kPremul_AlphaType
+        kPremul_SkAlphaType
     };
     SkSurface* surface;
     bool useGpu = NULL != factory;
@@ -763,7 +763,7 @@ static void TestDeferredCanvasSetSurface(skiatest::Reporter* reporter, GrContext
         10,  // width
         10,  // height
         SkImage::kPMColor_ColorType,
-        SkImage::kPremul_AlphaType
+        kPremul_SkAlphaType
     };
     SkSurface* surface;
     SkSurface* alternateSurface;