Deprecate FileError in FileAPI

LayoutTests/fast/filesystem/resources/op-copy.js

 var testCases = [
     {
         name: 'CopyFileSimple',
         precondition: [
             {fullPath:'/a', isDirectory:true},
             {fullPath:'/a/b'}
         ],
         tests: [
             function(helper) { helper.copy('/a/b', '/a', 'c'); }
         ],
@@ skipping 50 matching lines @@
             {fullPath:'/c/b'}
         ],
     },
     {
         name: 'CopyFileWithEmptyNameToSameDirectory',
         precondition: [
             {fullPath:'/a', isDirectory:true},
             {fullPath:'/a/b'},
         ],
         tests: [
-            function(helper) { helper.copy('/a/b', '/a', null, FileError.INVALID_MODIFICATION_ERR); },
+            function(helper) { helper.copy('/a/b', '/a', null, 'InvalidModificationError'); },
         ],
         postcondition: [
             {fullPath:'/a', isDirectory:true},
             {fullPath:'/a/b'},
         ],
     },
     {
         name: 'CopyFileWithSameName',
         precondition: [
             {fullPath:'/a', isDirectory:true},
             {fullPath:'/a/b'},
         ],
         tests: [
-            function(helper) { helper.copy('/a/b', '/a', 'b', FileError.INVALID_MODIFICATION_ERR); },
+            function(helper) { helper.copy('/a/b', '/a', 'b', 'InvalidModificationError'); },
         ],
         postcondition: [
             {fullPath:'/a', isDirectory:true},
             {fullPath:'/a/b'},
         ],
     },
     {
         name: 'CopyForNonExistentEntry',
         precondition: [
             {fullPath:'/a', isDirectory:true},
             {fullPath:'/a/b'},
             {fullPath:'/c', isDirectory:true},
         ],
         tests: [
             function(helper) { helper.remove('/a/b'); },
-            function(helper) { helper.copy('/a/b', '/c', 'b', FileError.NOT_FOUND_ERR); },
+            function(helper) { helper.copy('/a/b', '/c', 'b', 'NotFoundError'); },
         ],
         postcondition: [
             {fullPath:'/a', isDirectory:true},
             {fullPath:'/c', isDirectory:true},
         ],
     },
     {
         name: 'CopyEntryToNonExistentDirectory',
         precondition: [
             {fullPath:'/a', isDirectory:true},
             {fullPath:'/a/b'},
             {fullPath:'/c', isDirectory:true},
         ],
         tests: [
             function(helper) { helper.remove('/c'); },
-            function(helper) { helper.copy('/a/b', '/c', 'b', FileError.NOT_FOUND_ERR); },
+            function(helper) { helper.copy('/a/b', '/c', 'b', 'NotFoundError'); },
         ],
         postcondition: [
             {fullPath:'/a', isDirectory:true},
             {fullPath:'/a/b'},
         ],
     },
     {
         name: 'CopyEntryToItsChild',
         precondition: [
             {fullPath:'/a', isDirectory:true},
             {fullPath:'/a/b', isDirectory:true},
             {fullPath:'/a/b/c', isDirectory:true},
         ],
         tests: [
-            function(helper) { helper.copy('/a', '/a/b', 'd', FileError.INVALID_MODIFICATION_ERR); },
-            function(helper) { helper.copy('/a/b', '/a/b/c', 'd', FileError.INVALID_MODIFICATION_ERR); },
+            function(helper) { helper.copy('/a', '/a/b', 'd', 'InvalidModificationError'); },
+            function(helper) { helper.copy('/a/b', '/a/b/c', 'd', 'InvalidModificationError'); },
         ],
         postcondition: [
             {fullPath:'/a', isDirectory:true},
             {fullPath:'/a/b', isDirectory:true},
             {fullPath:'/a/b/c', isDirectory:true},
         ],
     },
     {
         name: 'CopyRecursive',
         precondition: [
@@ skipping 48 matching lines @@
             {fullPath:"/c/b"},
         ],
     },
     {
         name: "OverwritingCopyFileToDirectory",
         precondition: [
             {fullPath:"/a"},
             {fullPath:"/b", isDirectory: true},
         ],
         tests: [
-            function(helper) {helper.copy("/a","/","b",FileError.INVALID_MODIFICATION_ERR);}
+            function(helper) {helper.copy("/a","/","b",'InvalidModificationError');}
         ],
         postcondition: [
             {fullPath:"/a"},
             {fullPath:"/b", isDirectory: true},
         ],
     },
     {
         name: "OverwritingCopyDirectoryToFile",
         precondition: [
             {fullPath:"/a", isDirectory: true},
             {fullPath:"/b"},
         ],
         tests: [
-            function(helper) {helper.copy("/a","/","b",FileError.INVALID_MODIFICATION_ERR);}
+            function(helper) {helper.copy("/a","/","b",'InvalidModificationError');}
         ],
         postcondition: [
             {fullPath:"/a", isDirectory: true},
             {fullPath:"/b"},
         ],
     },
     {
         name: "OverwritingCopyFileToNonemptyDirectory",
         precondition: [
             {fullPath:"/a"},
             {fullPath:"/b", isDirectory: true},
             {fullPath:"/b/c"},
         ],
         tests: [
-            function(helper) {helper.copy("/a","/","b",FileError.INVALID_MODIFICATION_ERR);}
+            function(helper) {helper.copy("/a","/","b",'InvalidModificationError');}
         ],
         postcondition: [
             {fullPath:"/a"},
             {fullPath:"/b", isDirectory: true},
             {fullPath:"/b/c"},
         ],
     },
     {
         name: "OverwritingCopyDirectoryToNonemptyDirectory",
         precondition: [
             {fullPath:"/a", isDirectory: true},
             {fullPath:"/a/b"},
             {fullPath:"/c", isDirectory: true},
             {fullPath:"/c/d"},
         ],
         tests: [
-            function(helper) {helper.copy("/a","/","c",FileError.INVALID_MODIFICATION_ERR);}
+            function(helper) {helper.copy("/a","/","c",'InvalidModificationError');}
         ],
         postcondition: [
             {fullPath:"/a", isDirectory: true},
             {fullPath:"/a/b"},
             {fullPath:"/c", isDirectory: true},
             {fullPath:"/c/d"},
         ],
     },
 ];