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 2444898b390ed40f8356ae35964c8dc66216f536..58acdc2bf994d58eb212f976a8de62dfaae41be8 100644
--- a/ui/events/ozone/evdev/input_device_factory_evdev.h
+++ b/ui/events/ozone/evdev/input_device_factory_evdev.h
@@ -34,6 +34,8 @@ 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 {
@@ -64,6 +66,8 @@ class EVENTS_OZONE_EVDEV_EXPORT InputDeviceFactoryEvdev {
   // Bits from InputController that have to be answered on IO.
   void UpdateInputDeviceSettings(const InputDeviceSettingsEvdev& settings);
   void GetTouchDeviceStatus(const GetTouchDeviceStatusReply& reply);
+  void GetTouchEventLog(const base::FilePath& out_dir,
+                        const GetTouchEventLogReply& reply);
 
   base::WeakPtr<InputDeviceFactoryEvdev> GetWeakPtr();