Changes all non-workspace code to talk to WorkspaceManager via

ash/wm/workspace_controller_test_helper.h

Index: ash/wm/workspace_controller_test_helper.h
diff --git a/ash/wm/workspace_controller_test_helper.h b/ash/wm/workspace_controller_test_helper.h
index 547c1f4e9f8c8adc35b7f94f59bfba08c5e3f23b..04b19436bc2766b309adccf69f4413713e6716c5 100644
--- a/ash/wm/workspace_controller_test_helper.h
+++ b/ash/wm/workspace_controller_test_helper.h
@@ -20,6 +20,9 @@ class WorkspaceControllerTestHelper {
 
   WorkspaceEventFilter* filter() { return controller_->event_filter_; }
   MultiWindowResizeController* GetMultiWindowResizeController();
+  WorkspaceManager* workspace_manager() {
+    return controller_->workspace_manager_.get();
+  }
 
  private:
   WorkspaceController* controller_;