Deprecate FileError in FileAPI

LayoutTests/fast/filesystem/resources/op-restricted-chars.js

 var testCases = [
     {
         name: 'RestrictedChars',
         precondition: [
             {fullPath:'/ab', isDirectory:true},
         ],
         tests: [
             // Test for difficult characters in 'path' parameters.
             function(helper) { helper.getFile('/', 'a<b', {create:true}, 0); },
             function(helper) { helper.getFile('/', 'a>b', {create:true}, 0); },
@@ skipping 11 matching lines @@
             function(helper) { helper.getFile('/', '|ab', {create:true}, 0); },
 
             function(helper) { helper.getFile('/', 'ab<', {create:true}, 0); },
             function(helper) { helper.getFile('/', 'ab:', {create:true}, 0); },
             function(helper) { helper.getFile('/', 'ab?', {create:true}, 0); },
             function(helper) { helper.getFile('/', 'ab*', {create:true}, 0); },
             function(helper) { helper.getFile('/', 'ab"', {create:true}, 0); },
             function(helper) { helper.getFile('/', 'ab|', {create:true}, 0); },
 
             // Only '\\' is disallowed.
-            function(helper) { helper.getFile('/', 'a\\b', {create:true}, FileError.INVALID_MODIFICATION_ERR); },
+            function(helper) { helper.getFile('/', 'a\\b', {create:true}, 'InvalidModificationError'); },
 
             // Test for difficult characters in 'name' parameters.
             function(helper) { helper.copy('/ab', '/', ' a<b', 0); },
             function(helper) { helper.copy('/ab', '/', ' a:b', 0); },
             function(helper) { helper.copy('/ab', '/', ' a?b', 0); },
             function(helper) { helper.copy('/ab', '/', ' a*b', 0); },
             function(helper) { helper.copy('/ab', '/', ' a"b', 0); },
             function(helper) { helper.copy('/ab', '/', ' a|b', 0); },
 
             // 'Name' parameter cannot contain '/' or '\\'.
-            function(helper) { helper.copy('/ab', '/', 'a/b', FileError.INVALID_MODIFICATION_ERR); },
-            function(helper) { helper.copy('/ab', '/', 'a\\b', FileError.INVALID_MODIFICATION_ERR); },
+            function(helper) { helper.copy('/ab', '/', 'a/b', 'InvalidModificationError'); },
+            function(helper) { helper.copy('/ab', '/', 'a\\b', 'InvalidModificationError'); },
         ],
         postcondition: [
             {fullPath:'/ab', isDirectory:true},
             {fullPath:'a<b', isDirectory:false},
             {fullPath:' a|b', isDirectory:true}
         ],
     },
 ];