Dump touchpad event logs for touch log source

ui/events/ozone/evdev/input_device_factory_evdev.h

Index: ui/events/ozone/evdev/input_device_factory_evdev.h
diff --git a/ui/events/ozone/evdev/input_device_factory_evdev.h b/ui/events/ozone/evdev/input_device_factory_evdev.h
index 919fb74376c6f86e8f1f41a0a8423480a6833773..7600b89fbfa2b63266fd85f46dd49610fe78835d 100644
--- a/ui/events/ozone/evdev/input_device_factory_evdev.h
+++ b/ui/events/ozone/evdev/input_device_factory_evdev.h
@@ -33,6 +33,8 @@ class GesturePropertyProvider;
 #endif
 
 typedef base::Callback<void(scoped_ptr<std::string>)> GetTouchDeviceStatusReply;
+typedef base::Callback<void(scoped_ptr<std::vector<base::FilePath>>)>
+    GetTouchEventLogReply;
 
 // Manager for event device objects. All device I/O starts here.
 class EVENTS_OZONE_EVDEV_EXPORT InputDeviceFactoryEvdev {
@@ -69,6 +71,8 @@ class EVENTS_OZONE_EVDEV_EXPORT InputDeviceFactoryEvdev {
   void SetMouseSensitivity(int value);
   void SetTapToClickPaused(bool state);
   void GetTouchDeviceStatus(const GetTouchDeviceStatusReply& reply);
+  void GetTouchEventLog(const base::FilePath& out_dir,
+                        const GetTouchEventLogReply& reply);
 
   base::WeakPtr<InputDeviceFactoryEvdev> GetWeakPtr();