use AsMode instead of deprecated IsMode



git-svn-id: http://skia.googlecode.com/svn/trunk@2705 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index 69973be..869189f 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -1462,9 +1462,7 @@
     }
 
     if (NULL != xmode && NULL != texs && NULL != colors) {
-        SkXfermode::Mode mode;
-        if (!SkXfermode::IsMode(xmode, &mode) ||
-            SkXfermode::kMultiply_Mode != mode) {
+        if (!SkXfermode::IsMode(xmode, SkXfermode::kMultiply_Mode)) {
             SkDebugf("Unsupported vertex-color/texture xfer mode.\n");
 #if 0
             return