add missing case to switch

The NaCL SDK builds this code with -Wswitch-enum -Werror so
this is failing to build.

Perhaps in light if this its best to just remove the default
case?

BUG=


Review URL: https://chromiumcodereview.appspot.com/10855056

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150926 0039d316-1c4b-4281-b951-d872f2087c98

ppapi/cpp/var.cc

@@ -165,6 +165,7 @@ bool Var::operator==(const Var& other) const {
       return AsString() == other.AsString();
     case PP_VARTYPE_OBJECT:
     case PP_VARTYPE_ARRAY:
+    case PP_VARTYPE_ARRAY_BUFFER:
     case PP_VARTYPE_DICTIONARY:
     default:  // Objects, arrays, dictionaries.
       return var_.value.as_id == other.var_.value.as_id;