disable pnacl by default

chrome/test/data/nacl/pnacl_mime_type/pnacl_mime_type.html

Index: chrome/test/data/nacl/pnacl_mime_type/pnacl_mime_type.html
diff --git a/chrome/test/data/nacl/pnacl_mime_type/pnacl_mime_type.html b/chrome/test/data/nacl/pnacl_mime_type/pnacl_mime_type.html
index a96ad0b79fabc602433f51471ba5939219438550..cc648303ba24e97adc1926c76516ba36ce424212 100644
--- a/chrome/test/data/nacl/pnacl_mime_type/pnacl_mime_type.html
+++ b/chrome/test/data/nacl/pnacl_mime_type/pnacl_mime_type.html
@@ -21,16 +21,15 @@ function report(msg) {
   domAutomationController.send(JSON.stringify(msg));
 }
 
-var pnacl_disabled = (getTestArguments()["pnacl_disabled"] !== undefined);
+var is_pnacl = (getTestArguments()["pnacl"] !== undefined);
 var tests = 0;
 var errors = 0;
 
 var pnacl_mime_type = "application/x-pnacl";
-if (!pnacl_disabled && (navigator.mimeTypes[pnacl_mime_type] == undefined)) {
+if (is_pnacl && (navigator.mimeTypes[pnacl_mime_type] == undefined)) {
   report({type: "Log", message: "Error: could not find " + pnacl_mime_type});
   errors++;
-} else if (pnacl_disabled &&
-           (navigator.mimeTypes[pnacl_mime_type] !== undefined)) {
+} else if (!is_pnacl && (navigator.mimeTypes[pnacl_mime_type] !== undefined)) {
   report({type: "Log", message: "Error: unexpected " + pnacl_mime_type});
   errors++;
 }