Remove legacy names no longer referenced in Chrome and WebKit.
Review URL: https://codereview.appspot.com/7311055

git-svn-id: http://skia.googlecode.com/svn/trunk@7640 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrAtlas.cpp b/src/gpu/GrAtlas.cpp
index 48a4f39..c1d6d3d 100644
--- a/src/gpu/GrAtlas.cpp
+++ b/src/gpu/GrAtlas.cpp
@@ -149,7 +149,7 @@
         case kA565_GrMaskFormat:
             return kRGB_565_GrPixelConfig;
         case kA888_GrMaskFormat:
-            return kSkia8888_PM_GrPixelConfig;
+            return kSkia8888_GrPixelConfig;
         default:
             GrAssert(!"unknown maskformat");
     }