Chrome OS: avoid suspending on lid close when casting is active.

ash/shell.cc

 // Copyright (c) 2012 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 "ash/shell.h"
 
 #include <algorithm>
 #include <string>
 
 #include "ash/accelerators/accelerator_controller.h"
@@ skipping 565 matching lines @@
           gpu::GPU_FEATURE_TYPE_PANEL_FITTING);
 
   output_configurator_->Init(!is_panel_fitting_disabled);
   user_metrics_recorder_.reset(new UserMetricsRecorder);
 
   base::MessagePumpX11::Current()->AddDispatcherForRootWindow(
       output_configurator());
   // We can't do this with a root window listener because XI_HierarchyChanged
   // messages don't have a target window.
   base::MessagePumpX11::Current()->AddObserver(output_configurator());
+
+  MediaCaptureDevicesDispatcher::GetInstance()->AddObserver(
+      output_configurator());
 #endif  // defined(OS_CHROMEOS)
 
 #if defined(OS_CHROMEOS)
   internal::PowerStatus::Initialize();
 #endif
 }
 
 Shell::~Shell() {
   TRACE_EVENT0("shutdown", "ash::Shell::Destructor");
 
@@ skipping 107 matching lines @@
 #if defined(OS_CHROMEOS) && defined(USE_X11)
    if (display_change_observer_)
     output_configurator_->RemoveObserver(display_change_observer_.get());
   if (output_configurator_animation_)
     output_configurator_->RemoveObserver(output_configurator_animation_.get());
   if (display_error_observer_)
     output_configurator_->RemoveObserver(display_error_observer_.get());
   base::MessagePumpX11::Current()->RemoveDispatcherForRootWindow(
       output_configurator());
   base::MessagePumpX11::Current()->RemoveObserver(output_configurator());
+  MediaCaptureDevicesDispatcher::GetInstance()->RemoveObserver(
+      output_configurator());
   display_change_observer_.reset();
 #endif  // defined(OS_CHROMEOS)
 
 #if defined(OS_CHROMEOS)
   internal::PowerStatus::Shutdown();
 #endif
 
   DCHECK(instance_ == this);
   instance_ = NULL;
 }
@@ skipping 307 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 // Shell, aura::client::ActivationChangeObserver implementation:
 
 void Shell::OnWindowActivated(aura::Window* gained_active,
                               aura::Window* lost_active) {
   if (gained_active)
     target_root_window_ = gained_active->GetRootWindow();
 }
 
 }  // namespace ash