Drop all uses of //base except ObserverList from view mgr client lib

services/window_manager/window_manager_app.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "services/window_manager/window_manager_app.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/stl_util.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
 #include "mojo/converters/input_events/input_events_type_converters.h"
@@ skipping 353 matching lines @@
     mojo::ScopedMessagePipeHandle window_manager_pipe) {
   // TODO(sky): pass in |connection_id| for validation.
   WindowManagerImpl* wm = new WindowManagerImpl(this, true);
   wm->Bind(window_manager_pipe.Pass());
   // WindowManagerImpl is deleted when the connection has an error, or from our
   // destructor.
 }
 
 void WindowManagerApp::SetViewManagerClient(
     mojo::ScopedMessagePipeHandle view_manager_client_request) {
-  view_manager_client_ =
+  view_manager_client_.reset(
       mojo::ViewManagerClientFactory::WeakBindViewManagerToPipe(
           mojo::MakeRequest<mojo::ViewManagerClient>(
               view_manager_client_request.Pass()),
-          view_manager_service_.Pass(), shell_, this).Pass();
+          view_manager_service_.Pass(), shell_, this));
 }
 
 }  // namespace window_manager