Fixes #408

This is a bug on JSON.decode.  This should match the hand fix in #404.

[email protected]

Review URL: https://codereview.chromium.org/1579223002 .

Author: vsmenon

pkg/dev_compiler/lib/runtime/dart/convert.js

@@ -1050,7 +1050,7 @@ dart_library.library('dart/convert', null, /* Imports */[
     if (!(typeof source == 'string')) dart.throw(new core.ArgumentError(source));
     let parsed = null;
     try {
-      parsed = JSON.parse(source);
+      parsed = dart.global.JSON.parse(source);
     } catch (e) {
       dart.throw(new core.FormatException(String(e)));
     }

pkg/dev_compiler/test/codegen/expect/collection/src/unmodifiable_wrappers.txt

@@ -1,6 +1,6 @@
 // Messages from compiling unmodifiable_wrappers.dart
-severe: [AnalyzerMessage] Missing concrete implementation of 'Iterable.map' and 'Iterable.expand' (package:collection/src/unmodifiable_wrappers.dart, line 33, col 7)
-severe: [AnalyzerMessage] Missing concrete implementation of 'Iterable.expand' and 'Iterable.map' (package:collection/src/unmodifiable_wrappers.dart, line 136, col 7)
+severe: [AnalyzerMessage] Missing concrete implementation of 'Iterable.expand' and 'Iterable.map' (package:collection/src/unmodifiable_wrappers.dart, line 33, col 7)
+severe: [AnalyzerMessage] Missing concrete implementation of 'Iterable.map' and 'Iterable.expand' (package:collection/src/unmodifiable_wrappers.dart, line 136, col 7)
 warning: [DOWN_CAST_COMPOSITE] _throw() (dynamic) will need runtime check to cast to type E (package:collection/src/unmodifiable_wrappers.dart, line 88, col 28)
 warning: [DOWN_CAST_COMPOSITE] _throw() (dynamic) will need runtime check to cast to type E (package:collection/src/unmodifiable_wrappers.dart, line 94, col 21)
 warning: [DOWN_CAST_COMPOSITE] _throw() (dynamic) will need runtime check to cast to type V (package:collection/src/unmodifiable_wrappers.dart, line 218, col 41)

pkg/dev_compiler/tool/input_sdk/patch/convert_patch.dart

@@ -33,7 +33,7 @@ _parseJson(String source, reviver(key, value)) {
   var parsed;
   try {
     parsed = JS('=Object|JSExtendableArray|Null|bool|num|String',
-                'JSON.parse(#)',
+                'dart.global.JSON.parse(#)',
                 source);
   } catch (e) {
     throw new FormatException(JS('String', 'String(#)', e));