diff -r 000000000000 -r 6474c204b198 dom/plugins/test/mochitest/hangui_common.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/plugins/test/mochitest/hangui_common.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+// Plugin Hang UI constants
+const HANGUIOP_NOTHING = 0;
+const HANGUIOP_CANCEL = 1;
+const HANGUIOP_COMMAND = 2;
+const IDC_CONTINUE = 1001;
+const IDC_STOP = 1002;
+const IDC_NOFUTURE = 1003;
+
+// Windows constants
+const WM_CLOSE = 0x0010;
+const WM_COMMAND = 0x0111;
+const BM_GETCHECK = 0x00F0;
+const BM_SETCHECK = 0x00F1;
+const BN_CLICKED = 0;
+const BST_CHECKED = 1;
+
+// Test-specific constants
+const EPSILON_MS = 1000;
+const STALL_DURATION = 2;
+