cleanup: move DomAdapter from angular2/core into angular2/platform/common_dom

BREAKING CHANGE

Before

import {DomAdapter} from 'angular2/core';

After

import {DomAdapter} from 'angular2/platform/common_dom';

Closes #5370

modules/angular2/test/core/debug/debug_element_spec.ts

@@ -14,7 +14,7 @@ import {
   TestComponentBuilder
 } from 'angular2/testing_internal';
 
-import {DOM} from 'angular2/src/core/dom/dom_adapter';
+import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 
 import {PromiseWrapper, EventEmitter, ObservableWrapper} from 'angular2/src/facade/async';
 

modules/angular2/test/core/dom/dom_adapter_spec.ts

@@ -14,7 +14,7 @@ import {
   stringifyElement
 } from 'angular2/testing_internal';
 
-import {DOM} from 'angular2/src/core/dom/dom_adapter';
+import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 
 export function main() {
   describe('dom adapter', () => {

modules/angular2/test/core/linker/dynamic_component_loader_spec.ts

@@ -24,7 +24,7 @@ import {Component, View, ViewMetadata} from 'angular2/src/core/metadata';
 import {DynamicComponentLoader} from 'angular2/src/core/linker/dynamic_component_loader';
 import {ElementRef} from 'angular2/src/core/linker/element_ref';
 import {DOCUMENT} from 'angular2/src/platform/dom/dom_tokens';
-import {DOM} from 'angular2/src/core/dom/dom_adapter';
+import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 import {ComponentFixture_} from "angular2/src/testing/test_component_builder";
 
 export function main() {

modules/angular2/test/core/linker/integration_spec.ts

@@ -22,7 +22,7 @@ import {
 } from 'angular2/testing_internal';
 
 
-import {DOM} from 'angular2/src/core/dom/dom_adapter';
+import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 import {
   Type,
   isPresent,

modules/angular2/test/core/linker/projection_integration_spec.ts

@@ -20,7 +20,7 @@ import {
   tick
 } from 'angular2/testing_internal';
 
-import {DOM} from 'angular2/src/core/dom/dom_adapter';
+import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 import {AppViewListener} from 'angular2/src/core/linker/view_listener';
 
 import {

modules/angular2/test/core/linker/query_list_spec.ts

@@ -14,7 +14,7 @@ import {MapWrapper, ListWrapper, iterateListLike} from 'angular2/src/facade/coll
 import {IS_DART, StringWrapper} from 'angular2/src/facade/lang';
 import {ObservableWrapper} from 'angular2/src/facade/async';
 import {QueryList} from 'angular2/src/core/linker/query_list';
-import {DOM} from 'angular2/src/core/dom/dom_adapter';
+import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 
 interface _JsQueryList {
   filter(c: any): any;

modules/angular2/test/core/render/dom/dom_renderer_integration_spec.ts

@@ -14,7 +14,7 @@ import {
 } from 'angular2/testing_internal';
 
 // import {MapWrapper} from 'angular2/src/facade/collection';
-// import {DOM} from 'angular2/src/core/dom/dom_adapter';
+// import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 
 // import {DomTestbed, TestRootView, elRef} from './dom_testbed';
 

modules/angular2/test/core/render/dom/events/event_manager_spec.ts

@@ -13,7 +13,7 @@ import {EventManager, EventManagerPlugin} from 'angular2/core';
 import {DomEventsPlugin} from 'angular2/src/platform/dom/events/dom_events';
 import {NgZone} from 'angular2/src/core/zone/ng_zone';
 import {ListWrapper, Map, MapWrapper} from 'angular2/src/facade/collection';
-import {DOM} from 'angular2/src/core/dom/dom_adapter';
+import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 
 export function main() {
   var domEventPlugin;

modules/angular2/test/core/render/dom/shared_styles_host_spec.ts

@@ -16,7 +16,7 @@ import {
   proxy
 } from 'angular2/testing_internal';
 
-import {DOM} from 'angular2/src/core/dom/dom_adapter';
+import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 import {DomSharedStylesHost} from 'angular2/src/platform/dom/shared_styles_host';
 
 export function main() {

modules/angular2/test/core/render/view_factory_spec.ts

@@ -25,7 +25,7 @@ import {
   RenderComponentTemplate
 } from 'angular2/src/core/render/api';
 import {SpyRenderEventDispatcher} from '../spies';
-import {DOM} from 'angular2/src/core/dom/dom_adapter';
+import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 import {ViewEncapsulation} from 'angular2/src/core/metadata';
 
 function beginElement(name: string, attrNameAndValues: string[], eventTargetAndNames: string[],

modules/angular2/test/core/spies.dart

@@ -12,7 +12,7 @@ import 'package:angular2/src/core/linker/proto_view_factory.dart';
 import 'package:angular2/src/core/linker/view_pool.dart';
 import 'package:angular2/src/core/linker/view_listener.dart';
 import 'package:angular2/src/core/linker/element_injector.dart';
-import 'package:angular2/src/core/dom/dom_adapter.dart';
+import 'package:angular2/src/platform/dom/dom_adapter.dart';
 import 'package:angular2/testing_internal.dart';
 
 @proxy

modules/angular2/test/core/spies.ts

@@ -14,7 +14,7 @@ import {AppViewManager} from 'angular2/src/core/linker/view_manager';
 import {AppViewPool} from 'angular2/src/core/linker/view_pool';
 import {AppViewListener} from 'angular2/src/core/linker/view_listener';
 import {ProtoViewFactory} from 'angular2/src/core/linker/proto_view_factory';
-import {DomAdapter} from 'angular2/src/core/dom/dom_adapter';
+import {DomAdapter} from 'angular2/src/platform/dom/dom_adapter';
 import {ClientMessageBroker} from 'angular2/src/web_workers/shared/client_message_broker';
 
 import {