refactor: Remove isDart from public API

BREAKING CHANGE:

- `IS_DARTIUM` no longer exported

modules/angular2/src/core/application_common.ts

@@ -7,8 +7,7 @@ import {
   BaseException,
   assertionsEnabled,
   print,
-  stringify,
-  isDart
+  stringify
 } from 'angular2/src/facade/lang';
 import {BrowserDomAdapter} from 'angular2/src/dom/browser_adapter';
 import {DOM} from 'angular2/src/dom/dom_adapter';
@@ -76,6 +75,7 @@ import {
 import {internalView} from 'angular2/src/core/compiler/view_ref';
 import {APP_COMPONENT_REF_PROMISE, APP_COMPONENT} from './application_tokens';
 import {wtfInit} from '../profile/wtf_init';
+import {EXCEPTION_BINDING} from './platform_bindings';
 
 var _rootInjector: Injector;
 
@@ -146,7 +146,7 @@ function _injectorBindings(appComponentType): List<Type | Binding | List<any>> {
     PipeResolver,
     Parser,
     Lexer,
-    bind(ExceptionHandler).toFactory(() => new ExceptionHandler(DOM, isDart ? false : true), []),
+    EXCEPTION_BINDING,
     bind(XHR).toValue(new XHRImpl()),
     ComponentUrlMapper,
     UrlResolver,

modules/angular2/src/core/platform_bindings.dart

@@ -0,0 +1,10 @@
+library angular2.platform_bindings;
+
+
+import 'package:angular2/di.dart';
+import './exception_handler.dart';
+import 'package:angular2/src/dom/dom_adapter.dart';
+
+exceptionFactory() => new ExceptionHandler(DOM, true);
+
+const EXCEPTION_BINDING = const Binding(ExceptionHandler, toFactory: exceptionFactory, deps: const []);

modules/angular2/src/core/platform_bindings.ts

@@ -0,0 +1,6 @@
+import {bind} from 'angular2/di';
+import {ExceptionHandler} from './exception_handler';
+import {DOM} from 'angular2/src/dom/dom_adapter';
+
+export const EXCEPTION_BINDING =
+    bind(ExceptionHandler).toFactory(() => new ExceptionHandler(DOM, false), []);

modules/angular2/src/facade/lang.dart

@@ -5,8 +5,6 @@ import 'dart:math' as math;
 import 'dart:convert' as convert;
 import 'dart:async' show Future;
 
-bool isDart = true;
-
 String getTypeNameForDebugging(Type type) => type.toString();
 
 class Math {

modules/angular2/src/facade/lang.ts

@@ -15,8 +15,6 @@ export function getTypeNameForDebugging(type: Type): string {
   return type['name'];
 }
 
-export var isDart = false;
-
 export class BaseException extends Error {
   stack;
   constructor(public message?: string, private _originalException?, private _originalStack?,

modules/angular2/src/test_lib/test_lib.dart

@@ -28,8 +28,6 @@ import 'package:angular2/src/facade/collection.dart' show StringMapWrapper;
 import 'test_injector.dart';
 export 'test_injector.dart' show inject;
 
-bool IS_DARTIUM = true;
-
 List _testBindings = [];
 Injector _injector;
 bool _isCurrentTestAsync;

modules/angular2/src/test_lib/test_lib.ts

@@ -33,9 +33,6 @@ export interface NgMatchers extends jasmine.Matchers {
 
 export var expect: (actual: any) => NgMatchers = <any>_global.expect;
 
-// TODO vsavkin: remove it and use lang/isDart instead
-export var IS_DARTIUM = false;
-
 export class AsyncTestCompleter {
   _done: Function;