exo: Implement wayland gamepad support

components/exo.gypi

 # Copyright 2015 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.
 
 {
   'targets': [
     {
       # GN version: //components/exo
       'target_name': 'exo',
       'type': 'static_library',
       'include_dirs': [
         '..',
       ],
       'dependencies': [
         '../ash/ash.gyp:ash',
         '../base/base.gyp:base',
         '../cc/cc.gyp:cc',
         '../cc/cc.gyp:cc_surfaces',
+        # todo(denniskempin): add gyp dependency to /device/gamepad once it exists.

[reveman, 2016/06/27 17:30:34]

nit: not sure this is needed as it's pretty obvious that it should be added once
we start depending on compiled code in device/gamepad

[denniskempin, 2016/06/29 17:12:25]

done. I was just waiting for a gyp build file to be added to bajones@s CL. 

         '../gpu/gpu.gyp:gpu',
         '../skia/skia.gyp:skia',
         '../ui/aura/aura.gyp:aura',
         '../ui/compositor/compositor.gyp:compositor',
         '../ui/gfx/gfx.gyp:gfx',
         '../ui/gfx/gfx.gyp:gfx_geometry',
         '../ui/gl/gl.gyp:gl',
         '../ui/views/views.gyp:views',
         '../ui/wm/wm.gyp:wm',
       ],
       'export_dependent_settings': [
         '../ui/views/views.gyp:views',
       ],
       'sources': [
         # Note: sources list duplicated in GN build.
         'exo/buffer.cc',
         'exo/buffer.h',
         'exo/display.cc',
         'exo/display.h',
+        'exo/gamepads.cc',
+        'exo/gamepads.h',
         'exo/keyboard.cc',
         'exo/keyboard.h',
         'exo/keyboard_delegate.h',
         'exo/pointer.cc',
         'exo/pointer.h',
         'exo/pointer_delegate.h',
         'exo/shared_memory.cc',
         'exo/shared_memory.h',
         'exo/shell_surface.cc',
         'exo/shell_surface.h',
@@ skipping 18 matching lines @@
           'target_name': 'exo_wayland',
           'type': 'static_library',
           'include_dirs': [
             '..',
           ],
           'dependencies': [
             '../base/base.gyp:base',
             '../ipc/ipc.gyp:ipc',
             '../skia/skia.gyp:skia',
             '../third_party/wayland-protocols/wayland-protocols.gyp:alpha_compositing_protocol',
+            '../third_party/wayland-protocols/wayland-protocols.gyp:gamepads_protocol',
             '../third_party/wayland-protocols/wayland-protocols.gyp:remote_shell_protocol',
             '../third_party/wayland-protocols/wayland-protocols.gyp:secure_output_protocol',
             '../third_party/wayland-protocols/wayland-protocols.gyp:viewporter_protocol',
             '../third_party/wayland-protocols/wayland-protocols.gyp:xdg_shell_protocol',
             '../third_party/wayland-protocols/wayland-protocols.gyp:vsync_feedback_protocol',
             '../third_party/wayland/wayland.gyp:wayland_server',
             '../ui/aura/aura.gyp:aura',
             '../ui/events/events.gyp:dom_keycode_converter',
             '../ui/display/display.gyp:display',
             '../ui/events/events.gyp:events_base',
@@ skipping 22 matching lines @@
               'defines': [
                 'USE_XKBCOMMON',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }