[WIP] Moving viewer.js into own service, still buggy

src/amp.js

@@ -16,10 +16,10 @@
 
 import './polyfills';
 
+import {installViewerService} from './service/viewer-impl';
 import {installHistoryService} from './service/history-impl';
 import {installPullToRefreshBlocker} from './pull-to-refresh';
 import {performanceFor} from './performance';
-import {viewerFor} from './viewer';
 import {vsyncFor} from './vsync';
 import {templatesFor} from './template';
 
@@ -47,8 +47,8 @@ try {
   perf.tick('is');
   installStyles(document, cssText, () => {
     try {
+      installViewerService(window);
       installHistoryService(window);
-      viewerFor(window);
       vsyncFor(window);
       templatesFor(window);
 

src/history.js

@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+import {getElementService} from './service';
+
 /**
  * Returns service implemented in service/history-impl.
  * @param {!Window} window

src/service/history-impl.js

@@ -14,13 +14,15 @@
  * limitations under the License.
  */
 
+import {installViewerService} from '../service/viewer-impl';
 import {Pass} from '../pass';
 import {assert} from '../asserts';
 import {getService} from '../service';
 import {log} from '../log';
 import {timer} from '../timer';
 import {viewerFor} from '../viewer';
 
+installViewerService(window);
 
 /** @private @const */
 const TAG_ = 'History';