Mark OutOfProcessPPAPITest.Instance unit test as DISABLED.

BUG=91729
TEST=None
Review URL: http://codereview.chromium.org/7462021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96289 0039d316-1c4b-4281-b951-d872f2087c98

chrome/test/ui/ppapi_uitest.cc

@@ -159,7 +159,8 @@ TEST_PPAPI_IN_PROCESS(CursorControl)
 TEST_PPAPI_OUT_OF_PROCESS(CursorControl)
 
 TEST_PPAPI_IN_PROCESS(Instance)
-TEST_PPAPI_OUT_OF_PROCESS(Instance)
+// http://crbug.com/91729
+TEST_PPAPI_OUT_OF_PROCESS(DISABLED_Instance)
 
 TEST_PPAPI_IN_PROCESS(Graphics2D)
 // Disabled because it times out: http://crbug.com/89961