Enable InputDeviceServer/InputDeviceClient in mash.

chrome/browser/ui/views/chrome_browser_main_extra_parts_views.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 "chrome/browser/ui/views/chrome_browser_main_extra_parts_views.h"
 
 #include "chrome/browser/ui/views/chrome_constrained_window_views_client.h"
 #include "chrome/browser/ui/views/chrome_views_delegate.h"
 #include "components/constrained_window/constrained_window_views.h"
 
 #if defined(USE_AURA)
 #include "ui/display/screen.h"
 #include "ui/views/widget/desktop_aura/desktop_screen.h"
 #include "ui/wm/core/wm_state.h"
 #endif
 
 #if defined(USE_AURA) && defined(MOJO_SHELL_CLIENT)
+#include "components/mus/public/cpp/input_devices/input_device_client.h"
+#include "components/mus/public/interfaces/input_devices/input_device_server.mojom.h"
 #include "content/public/common/mojo_shell_connection.h"
+#include "services/shell/public/cpp/connector.h"
 #include "ui/views/mus/window_manager_connection.h"
 #endif
 
 ChromeBrowserMainExtraPartsViews::ChromeBrowserMainExtraPartsViews() {
 }
 
 ChromeBrowserMainExtraPartsViews::~ChromeBrowserMainExtraPartsViews() {
   constrained_window::SetConstrainedWindowViewsClient(nullptr);
 }
 
@@ skipping 14 matching lines @@
 #if defined(USE_AURA) && !defined(OS_CHROMEOS)
   display::Screen::SetScreenInstance(views::CreateDesktopScreen());
 #endif
 }
 
 void ChromeBrowserMainExtraPartsViews::PreProfileInit() {
 #if defined(USE_AURA) && defined(MOJO_SHELL_CLIENT)
   content::MojoShellConnection* mojo_shell_connection =
       content::MojoShellConnection::Get();
   if (mojo_shell_connection && mojo_shell_connection->UsingExternalShell()) {
+    input_device_client_.reset(new input_device::InputDeviceClient());
+    input_device::mojom::InputDeviceServerPtr server;
+    mojo_shell_connection->GetConnector()->ConnectToInterface("mojo:mus",
+                                                              &server);
+    input_device_client_->Connect(std::move(server));
+
     window_manager_connection_ = views::WindowManagerConnection::Create(
         mojo_shell_connection->GetConnector(),
         mojo_shell_connection->GetIdentity());
   }
 #endif  // defined(USE_AURA) && defined(MOJO_SHELL_CLIENT)
   ChromeBrowserMainExtraParts::PreProfileInit();
 }