Cleanup: Remove user_gesture parameter from DispatchEventToSender.

The value of the param is always USER_GESTURE_UNKNOWN.
This is makes gesture handling code slightly cleaner to read.

Bug: None
Test: No visible changes, internal cleanup.
Change-Id: I9b6503285bc711f08aea622681dadd3f1ed0eecb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1659349
Reviewed-by: Devlin <[email protected]>
Commit-Queue: Istiaque Ahmed <[email protected]>
Cr-Commit-Position: refs/heads/master@{#669448}
diff --git a/extensions/browser/event_router.h b/extensions/browser/event_router.h
index 7bf6493..ec6ec9c 100644
--- a/extensions/browser/event_router.h
+++ b/extensions/browser/event_router.h
@@ -103,6 +103,8 @@
   //
   // It is very rare to call this function directly. Instead use the instance
   // methods BroadcastEvent or DispatchEventToExtension.
+  // Note that this method will dispatch the event with
+  // UserGestureState:USER_GESTURE_UNKNOWN.
   static void DispatchEventToSender(IPC::Sender* ipc_sender,
                                     void* browser_context_id,
                                     const std::string& extension_id,
@@ -112,7 +114,6 @@
                                     int worker_thread_id,
                                     int64_t service_worker_version_id,
                                     std::unique_ptr<base::ListValue> event_args,
-                                    UserGestureState user_gesture,
                                     const EventFilteringInfo& info);
 
   // Returns false when the event is scoped to a context and the listening