Make Mandoline shut down cleanly.

components/native_viewport/platform_viewport_x11.cc

 // Copyright 2013 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 "components/native_viewport/platform_viewport.h"
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
 #include "mojo/converters/input_events/input_events_type_converters.h"
 #include "mojo/converters/input_events/mojo_extended_key_event_data.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/platform/platform_event_dispatcher.h"
-#include "ui/events/platform/platform_event_source.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/platform_window/platform_window.h"
 #include "ui/platform_window/platform_window_delegate.h"
 #include "ui/platform_window/x11/x11_window.h"
 
 namespace native_viewport {
 namespace {
 
 float ConvertUIWheelValueToMojoValue(int offset) {
   // Mojo's event type takes a value between -1 and 1. Normalize by allowing
@@ skipping 12 matching lines @@
   }
 
   ~PlatformViewportX11() override {
     // Destroy the platform-window while |this| is still alive.
     platform_window_.reset();
   }
 
  private:
   // Overridden from PlatformViewport:
   void Init(const gfx::Rect& bounds) override {
-    CHECK(!event_source_);
     CHECK(!platform_window_);
 
-    event_source_ = ui::PlatformEventSource::CreateDefault();
-
     metrics_ = mojo::ViewportMetrics::New();
     // TODO(sky): make density real.
     metrics_->device_pixel_ratio = 1.f;
     metrics_->size = mojo::Size::From(bounds.size());
 
     platform_window_.reset(new ui::X11Window(this));
     platform_window_->SetBounds(bounds);
   }
 
   void Show() override { platform_window_->Show(); }
@@ skipping 84 matching lines @@
 
   void OnLostCapture() override {}
 
   void OnAcceleratedWidgetAvailable(gfx::AcceleratedWidget widget) override {
     delegate_->OnAcceleratedWidgetAvailable(widget,
                                             metrics_->device_pixel_ratio);
   }
 
   void OnActivationChanged(bool active) override {}
 
-  scoped_ptr<ui::PlatformEventSource> event_source_;
   scoped_ptr<ui::PlatformWindow> platform_window_;
   Delegate* delegate_;
   mojo::ViewportMetricsPtr metrics_;
 
   DISALLOW_COPY_AND_ASSIGN(PlatformViewportX11);
 };
 
 // static
 scoped_ptr<PlatformViewport> PlatformViewport::Create(Delegate* delegate) {
   return make_scoped_ptr(new PlatformViewportX11(delegate));
 }
 
 }  // namespace native_viewport