feat(dom): add location and history as DOM-like APIs.

Instead of global access methods.

Author: rkirov

modules/angular2/src/dom/browser_adapter.dart

@@ -307,4 +307,10 @@ class BrowserDomAdapter extends GenericBrowserDomAdapter {
       return document.body;
     }
   }
+  getHistory() {
+    return window.history;
+  }
+  getLocation() {
+    return window.location;
+  }
 }

modules/angular2/src/dom/browser_adapter.es6

@@ -372,4 +372,10 @@ export class BrowserDomAdapter extends GenericBrowserDomAdapter {
       return document.body;
     }
   }
+  getHistory() {
+    return window.history;
+  }
+  getLocation() {
+    return window.location;
+  }
 }

modules/angular2/src/dom/dom_adapter.js

@@ -283,4 +283,10 @@ export class DomAdapter {
   getGlobalEventTarget(target:string) {
     throw _abstract();
   }
+  getHistory() {
+    throw _abstract();
+  }
+  getLocation() {
+    throw _abstract();
+  }
 }

modules/angular2/src/dom/html_adapter.dart

@@ -281,4 +281,10 @@ class Html5LibDomAdapter implements DomAdapter {
   bool supportsNativeShadowDOM() {
     throw 'not implemented';
   }
+  getHistory() {
+    throw 'not implemented';
+  }
+  getLocation() {
+    throw 'not implemented';
+  }
 }

modules/angular2/src/dom/parse5_adapter.cjs

@@ -523,6 +523,12 @@ export class Parse5DomAdapter extends DomAdapter {
       return this.defaultDoc().body;
     }
   }
+  getHistory() {
+    throw 'not implemented';
+  }
+  getLocation() {
+    throw 'not implemented';
+  }
 }
 
 //TODO: build a proper list, this one is all the keys of a HTMLInputElement

modules/angular2/src/router/location.js

@@ -1,4 +1,4 @@
-import {global} from 'angular2/src/facade/lang';
+import {DOM} from 'angular2/src/dom/dom_adapter';
 import {EventEmitter, ObservableWrapper} from 'angular2/src/facade/async';
 
 export class Location {
@@ -7,9 +7,9 @@ export class Location {
   _history;
   constructor() {
     this._subject = new EventEmitter();
-    this._location = global.location;
-    this._history = global.history;
-    global.addEventListener('popstate', (_) => this._onPopState(_), false);
+    this._location = DOM.getLocation();
+    this._history = DOM.getHistory();
+    DOM.getGlobalEventTarget('window').addEventListener('popstate', (_) => this._onPopState(_), false);
   }
 
   _onPopState(_) {