Stop writing out XPS baselines until we resolve skia issue 455

BUG=455
TBR=bungeman
Review URL: https://codereview.appspot.com/5554052

git-svn-id: http://skia.googlecode.com/svn/trunk@3068 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/gmmain.cpp b/gm/gmmain.cpp
index 1e0c5b5..c1304a2 100644
--- a/gm/gmmain.cpp
+++ b/gm/gmmain.cpp
@@ -33,6 +33,9 @@
     #include "SkPDFDocument.h"
 #endif
 
+// Until we resolve http://code.google.com/p/skia/issues/detail?id=455 ,
+// stop writing out XPS-format image baselines in gm.
+#undef SK_SUPPORT_XPS
 #ifdef SK_SUPPORT_XPS
     #include "SkXPSDevice.h"
 #endif