Make wm_flow_init work with gn

mojo/examples/wm_flow/wm/wm.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 <vector>
 
 #include "mojo/application/application_runner_chromium.h"
 #include "mojo/examples/wm_flow/wm/frame_controller.h"
 #include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/application/application_delegate.h"
@@ skipping 84 matching lines @@
         window_manager_app_(new mojo::WindowManagerApp(this, this)),
         view_manager_(NULL),
         root_(NULL),
         window_container_(NULL),
         next_window_origin_(10, 10) {}
   virtual ~SimpleWM() {}
 
  private:
   // Overridden from mojo::ApplicationDelegate:
   virtual void Initialize(mojo::ApplicationImpl* impl) override {
+    // Create views_init here as we need ApplicationRunnerChromium to install
+    // an AtExitManager and CommandLine.
+    if (!views_init_.get())
+      views_init_.reset(new mojo::ViewsInit);
     shell_ = impl->shell();
     window_manager_app_->Initialize(impl);
   }
   virtual bool ConfigureIncomingConnection(
       mojo::ApplicationConnection* connection) override {
     window_manager_app_->ConfigureIncomingConnection(connection);
     return true;
   }
 
   // Overridden from mojo::ViewManagerDelegate:
@@ skipping 61 matching lines @@
 
     aura::client::ActivationClient* client = aura::client::GetActivationClient(
         window_manager_app_->host()->window());
     new FrameController(
         shell_, frame_view, app_view, client, window_manager_app_.get());
     return frame_view;
   }
 
   mojo::Shell* shell_;
 
+  scoped_ptr<mojo::ViewsInit> views_init_;
+
   scoped_ptr<mojo::WindowManagerApp> window_manager_app_;
 
   mojo::ViewManager* view_manager_;
   mojo::View* root_;
   mojo::View* window_container_;
 
   gfx::Point next_window_origin_;
 
   DISALLOW_COPY_AND_ASSIGN(SimpleWM);
 };
 
 }  // namespace examples
 
 MojoResult MojoMain(MojoHandle shell_handle) {
-  mojo::ViewsInit views_init;
   mojo::ApplicationRunnerChromium runner(new examples::SimpleWM);
   return runner.Run(shell_handle);
 }