refactor(Location): out of router and into platform/common

closes https://github.com/angular/angular/issues/4943

BREAKING CHANGE:

`Location` and other related providers have been moved out of `router` and into `platform/common`. `BrowserPlatformLocation` is not meant to be used directly however advanced configurations may use it via the following import change.

Before:

```
import {
  PlatformLocation,
  Location,
  LocationStrategy,
  HashLocationStrategy,
  PathLocationStrategy,
  APP_BASE_HREF}
from 'angular2/router';

import {BrowserPlatformLocation} from 'angular2/src/router/location/browser_platform_location';
```

After:

```
import {
  PlatformLocation,
  Location,
  LocationStrategy,
  HashLocationStrategy,
  PathLocationStrategy,
  APP_BASE_HREF}
from 'angular2/platform/common';

import {BrowserPlatformLocation} from 'angular2/src/platform/browser/location/browser_platform_location';
```

Closes #7962

modules/angular2/test/router/directives/router_link_spec.ts

@@ -18,9 +18,9 @@ import {SpyRouter, SpyLocation} from '../spies';
 
 import {provide, Component} from 'angular2/core';
 import {By} from 'angular2/platform/common_dom';
+import {Location} from 'angular2/platform/common';
 
 import {
-  Location,
   Router,
   RouteRegistry,
   RouterLink,

modules/angular2/test/router/integration/bootstrap_spec.ts

@@ -15,6 +15,7 @@ import {
 } from 'angular2/testing_internal';
 
 import {bootstrap} from 'angular2/platform/browser';
+import {APP_BASE_HREF, LocationStrategy} from 'angular2/platform/common';
 import {Component, Directive} from 'angular2/src/core/metadata';
 import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 import {Console} from 'angular2/src/core/console';
@@ -33,9 +34,7 @@ import {
   ROUTER_PRIMARY_COMPONENT,
   RouteParams,
   Router,
-  APP_BASE_HREF,
-  ROUTER_DIRECTIVES,
-  LocationStrategy
+  ROUTER_DIRECTIVES
 } from 'angular2/router';
 
 import {MockLocationStrategy} from 'angular2/src/mock/mock_location_strategy';

modules/angular2/test/router/integration/impl/async_route_spec_impl.ts

@@ -12,12 +12,12 @@ import {
   xit,
 } from 'angular2/testing_internal';
 
-
 import {By} from 'angular2/platform/common_dom';
+import {Location} from 'angular2/platform/common';
 
 import {specs, compile, TEST_ROUTER_PROVIDERS, clickOnElement, getHref} from '../util';
 
-import {Router, AsyncRoute, Route, Location} from 'angular2/router';
+import {Router, AsyncRoute, Route} from 'angular2/router';
 
 import {
   HelloCmp,

modules/angular2/test/router/integration/impl/aux_route_spec_impl.ts

@@ -16,9 +16,10 @@ import {
 } from 'angular2/testing_internal';
 
 import {By} from 'angular2/platform/common_dom';
+import {Location} from 'angular2/platform/common';
 import {provide, Component, Injector, Inject} from 'angular2/core';
 
-import {Router, ROUTER_DIRECTIVES, RouteParams, RouteData, Location} from 'angular2/router';
+import {Router, ROUTER_DIRECTIVES, RouteParams, RouteData} from 'angular2/router';
 import {
   RouteConfig,
   Route,

modules/angular2/test/router/integration/impl/sync_route_spec_impl.ts

@@ -15,7 +15,8 @@ import {
 import {specs, compile, TEST_ROUTER_PROVIDERS, clickOnElement, getHref} from '../util';
 
 import {By} from 'angular2/platform/common_dom';
-import {Router, Route, Location} from 'angular2/router';
+import {Location} from 'angular2/platform/common';
+import {Router, Route} from 'angular2/router';
 
 import {
   HelloCmp,

modules/angular2/test/router/integration/navigation_spec.ts

@@ -16,9 +16,10 @@ import {
 } from 'angular2/testing_internal';
 
 import {provide, Component, Injector, Inject} from 'angular2/core';
+import {Location} from 'angular2/platform/common';
 import {PromiseWrapper, TimerWrapper} from 'angular2/src/facade/async';
 
-import {Router, RouterOutlet, RouterLink, RouteParams, RouteData, Location} from 'angular2/router';
+import {Router, RouterOutlet, RouterLink, RouteParams, RouteData} from 'angular2/router';
 import {
   RouteConfig,
   Route,

modules/angular2/test/router/integration/redirect_route_spec.ts

@@ -15,7 +15,7 @@ import {
   xit
 } from 'angular2/testing_internal';
 
-import {Router, RouterOutlet, RouterLink, RouteParams, RouteData, Location} from 'angular2/router';
+import {Router, RouterOutlet, RouterLink, RouteParams, RouteData} from 'angular2/router';
 import {
   RouteConfig,
   Route,
@@ -23,6 +23,7 @@ import {
   AsyncRoute,
   Redirect
 } from 'angular2/src/router/route_config/route_config_decorator';
+import {Location} from 'angular2/platform/common';
 
 import {TEST_ROUTER_PROVIDERS, RootCmp, compile} from './util';
 import {HelloCmp, GoodbyeCmp, RedirectToParentCmp} from './impl/fixture_components';

modules/angular2/test/router/integration/router_link_spec.ts

@@ -18,6 +18,7 @@ import {
 } from 'angular2/testing_internal';
 
 import {By} from 'angular2/platform/common_dom';
+import {Location} from 'angular2/platform/common';
 import {NumberWrapper} from 'angular2/src/facade/lang';
 import {PromiseWrapper} from 'angular2/src/facade/async';
 import {ListWrapper} from 'angular2/src/facade/collection';
@@ -26,7 +27,6 @@ import {provide, Component} from 'angular2/core';
 
 import {SpyLocation} from 'angular2/src/mock/location_mock';
 import {
-  Location,
   Router,
   RouteRegistry,
   RouterLink,

modules/angular2/test/router/integration/util.ts

@@ -21,7 +21,7 @@ import {RootRouter} from 'angular2/src/router/router';
 import {Router, ROUTER_DIRECTIVES, ROUTER_PRIMARY_COMPONENT} from 'angular2/router';
 
 import {SpyLocation} from 'angular2/src/mock/location_mock';
-import {Location} from 'angular2/src/router/location/location';
+import {Location} from 'angular2/platform/common';
 import {RouteRegistry} from 'angular2/src/router/route_registry';
 import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 export {ComponentFixture} from 'angular2/testing_internal';

modules/angular2/test/router/location/hash_location_strategy_spec.ts

@@ -14,9 +14,7 @@ import {
 
 import {Injector, provide} from 'angular2/core';
 
-import {PlatformLocation} from 'angular2/src/router/location/platform_location';
-import {APP_BASE_HREF} from 'angular2/src/router/location/location_strategy';
-import {HashLocationStrategy} from 'angular2/src/router/location/hash_location_strategy';
+import {PlatformLocation, APP_BASE_HREF, HashLocationStrategy} from 'angular2/platform/common';
 import {SpyPlatformLocation} from '../spies';
 
 export function main() {

modules/angular2/test/router/location/location_spec.ts

@@ -15,8 +15,7 @@ import {
 import {Injector, provide} from 'angular2/core';
 import {CONST_EXPR} from 'angular2/src/facade/lang';
 
-import {Location} from 'angular2/src/router/location/location';
-import {LocationStrategy, APP_BASE_HREF} from 'angular2/src/router/location/location_strategy';
+import {Location, LocationStrategy, APP_BASE_HREF} from 'angular2/platform/common';
 import {MockLocationStrategy} from 'angular2/src/mock/mock_location_strategy';
 
 export function main() {

modules/angular2/test/router/location/path_location_strategy_spec.ts

@@ -15,9 +15,12 @@ import {
 import {Injector, provide} from 'angular2/core';
 import {CONST_EXPR} from 'angular2/src/facade/lang';
 
-import {PlatformLocation} from 'angular2/src/router/location/platform_location';
-import {LocationStrategy, APP_BASE_HREF} from 'angular2/src/router/location/location_strategy';
-import {PathLocationStrategy} from 'angular2/src/router/location/path_location_strategy';
+import {
+  PlatformLocation,
+  LocationStrategy,
+  PathLocationStrategy,
+  APP_BASE_HREF
+} from 'angular2/platform/common';
 import {SpyPlatformLocation} from '../spies';
 
 export function main() {

modules/angular2/test/router/route_config/route_config_spec.ts

@@ -12,6 +12,7 @@ import {
 } from 'angular2/testing_internal';
 
 import {bootstrap} from 'angular2/platform/browser';
+import {APP_BASE_HREF, LocationStrategy} from 'angular2/platform/common';
 import {Component, Directive} from 'angular2/src/core/metadata';
 import {DOM} from 'angular2/src/platform/dom/dom_adapter';
 import {Console} from 'angular2/src/core/console';
@@ -19,16 +20,9 @@ import {provide} from 'angular2/core';
 import {DOCUMENT} from 'angular2/src/platform/dom/dom_tokens';
 import {Type, IS_DART} from 'angular2/src/facade/lang';
 
-import {
-  ROUTER_PROVIDERS,
-  Router,
-  RouteConfig,
-  APP_BASE_HREF,
-  ROUTER_DIRECTIVES
-} from 'angular2/router';
+import {ROUTER_PROVIDERS, Router, RouteConfig, ROUTER_DIRECTIVES} from 'angular2/router';
 
 import {ExceptionHandler} from 'angular2/src/facade/exceptions';
-import {LocationStrategy} from 'angular2/src/router/location/location_strategy';
 import {MockLocationStrategy} from 'angular2/src/mock/mock_location_strategy';
 
 class _ArrayLogger {

modules/angular2/test/router/router_spec.ts

@@ -18,7 +18,7 @@ import {ListWrapper} from 'angular2/src/facade/collection';
 
 import {Router, RootRouter} from 'angular2/src/router/router';
 import {SpyLocation} from 'angular2/src/mock/location_mock';
-import {Location} from 'angular2/src/router/location/location';
+import {Location} from 'angular2/platform/common';
 
 import {RouteRegistry, ROUTER_PRIMARY_COMPONENT} from 'angular2/src/router/route_registry';
 import {

modules/angular2/test/router/spies.dart

@@ -1,5 +1,6 @@
 library router.spies;
 
+import 'package:angular2/platform/common.dart' show PlatformLocation, Location;
 import 'package:angular2/router.dart';
 import 'package:angular2/testing_internal.dart';
 

modules/angular2/test/router/spies.ts

@@ -1,4 +1,5 @@
-import {Router, RouterOutlet, Location, PlatformLocation} from 'angular2/router';
+import {Location} from 'angular2/platform/common';
+import {Router, RouterOutlet} from 'angular2/router';
 import {SpyObject, proxy} from 'angular2/testing_internal';
 
 export class SpyRouter extends SpyObject {