Bug 1416066 - Update script_cache.py to support new version of startup script cache file. r=kmag

MozReview-Commit-ID: IuNZ3kjLcak

--HG--
extra : rebase_source : ef9dcd24f9311956bcae303336b874f6cc358905

js/xpconnect/loader/script_cache.py

@@ -4,7 +4,7 @@ import os
 import struct
 import sys
 
-MAGIC = b'mozXDRcachev001\0'
+MAGIC = b'mozXDRcachev002\0'
 
 
 def usage():
@@ -17,17 +17,20 @@ def usage():
 
 
 class ProcessTypes:
-    Default = 0
-    Web = 1
-    Extension = 2
-    Privileged = 3
+    Uninitialized = 0
+    Parent = 1
+    Web = 2
+    Extension = 3
+    Privileged = 4
 
     def __init__(self, val):
         self.val = val
 
     def __str__(self):
         res = []
-        if self.val & (1 << self.Default):
+        if self.val & (1 << self.Uninitialized):
+            raise Exception('Uninitialized process type')
+        if self.val & (1 << self.Parent):
             res.append('Parent')
         if self.val & (1 << self.Web):
             res.append('Web')