Adds special support to the device manager for keyboards devices.

ui/events/touchscreen_device.cc

Index: ui/events/touchscreen_device.cc
diff --git a/ui/events/touchscreen_device.cc b/ui/events/touchscreen_device.cc
index 07844a152c788f362437ee13e3d21496e4efd78c..58c2370d601271a7fba6e868109b45073c9f7410 100644
--- a/ui/events/touchscreen_device.cc
+++ b/ui/events/touchscreen_device.cc
@@ -4,15 +4,17 @@
 
 #include "ui/events/touchscreen_device.h"
 
-namespace ui {
+#include <string>
+
+#include "ui/events/input_device.h"
 
-// static
-const int TouchscreenDevice::kInvalidId = 0;
+namespace ui {
 
 TouchscreenDevice::TouchscreenDevice(int id,
-                                     const gfx::Size& size,
-                                     bool is_internal)
-    : id(id), size(size), is_internal(is_internal) {
+                                     InputDeviceType type,
+                                     const std::string& name,
+                                     const gfx::Size& size)
+    : InputDevice(id, type, name), size(size) {
 }
 
 }  // namespace ui