Adds special support to the device manager for keyboards devices.

ui/events/keyboard_device.cc

Index: ui/events/keyboard_device.cc
diff --git a/ui/events/platform/platform_event_source_stub.cc b/ui/events/keyboard_device.cc
similarity index 54%
copy from ui/events/platform/platform_event_source_stub.cc
copy to ui/events/keyboard_device.cc
index 57e2a61c3dc4f05f76e64140a738bf5458f3baa4..618077f1186560f61e0379db4c091c1e230a1cd1 100644
--- a/ui/events/platform/platform_event_source_stub.cc
+++ b/ui/events/keyboard_device.cc
@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ui/events/platform/platform_event_source.h"
+#include "ui/events/keyboard_device.h"
 
 namespace ui {
 
-scoped_ptr<PlatformEventSource> PlatformEventSource::CreateDefault() {
-  return scoped_ptr<PlatformEventSource>();
+KeyboardDevice::KeyboardDevice(int id, KeyboardDeviceType keyboard_type)
+    : id(id), type(keyboard_type) {
 }
 
 }  // namespace ui