ozone: gbm: Fix build

ui/ozone/platform/dri/ozone_platform_gbm.cc

Index: ui/ozone/platform/dri/ozone_platform_gbm.cc
diff --git a/ui/ozone/platform/dri/ozone_platform_gbm.cc b/ui/ozone/platform/dri/ozone_platform_gbm.cc
index 46e3bac4f2c6cc3fb9e5ced777896db81ccc1113..75f05515bd098cd5d955925fde5cac7d53e1350a 100644
--- a/ui/ozone/platform/dri/ozone_platform_gbm.cc
+++ b/ui/ozone/platform/dri/ozone_platform_gbm.cc
@@ -19,6 +19,7 @@
 
 #if defined(OS_CHROMEOS)
 #include "ui/ozone/common/chromeos/native_display_delegate_ozone.h"
+#include "ui/ozone/common/chromeos/touchscreen_device_manager_ozone.h"
 #endif
 
 namespace ui {
@@ -70,6 +71,11 @@ class OzonePlatformGbm : public OzonePlatform {
       OVERRIDE {
     return scoped_ptr<NativeDisplayDelegate>(new NativeDisplayDelegateOzone());
   }
+  virtual scoped_ptr<TouchscreenDeviceManager>
+      CreateTouchscreenDeviceManager() OVERRIDE {
+    return scoped_ptr<TouchscreenDeviceManager>(
+        new TouchscreenDeviceManagerOzone());
+  }
 #endif
   virtual void InitializeUI() OVERRIDE {
     // Needed since the browser process creates the accelerated widgets and that