Adjust cancelabilty of touchmoves that are queued when scroll start occurs

content/renderer/input/main_thread_event_queue_task_list.cc

Index: content/renderer/input/main_thread_event_queue_task_list.cc
diff --git a/content/renderer/input/main_thread_event_queue_task_list.cc b/content/renderer/input/main_thread_event_queue_task_list.cc
index d45a944de5f61c26ec14af6e92886408f29a3b72..58045942298a73a8d4805015c5bab5c18e132f09 100644
--- a/content/renderer/input/main_thread_event_queue_task_list.cc
+++ b/content/renderer/input/main_thread_event_queue_task_list.cc
@@ -14,12 +14,12 @@ void MainThreadEventQueueTaskList::Queue(
     std::unique_ptr<MainThreadEventQueueTask> event) {
   for (auto last_event_iter = queue_.rbegin(); last_event_iter != queue_.rend();
        ++last_event_iter) {
-    switch ((*last_event_iter)->CoalesceWith(*event.get())) {
-      case MainThreadEventQueueTask::CoalesceResult::Coalesced:
+    switch ((*last_event_iter)->NotifyEventWillBeQueued(*event.get())) {
+      case MainThreadEventQueueTask::NotifyResult::CoalescedEvent:
         return;
-      case MainThreadEventQueueTask::CoalesceResult::CannotCoalesce:
+      case MainThreadEventQueueTask::NotifyResult::Stop:

[tdresser, 2017/03/31 19:31:02]

I found "CannotCoalesce" a bit clearer here. Why the change?

[dtapuska, 2017/03/31 20:18:18]

As discussed in person it covers a few scenarios.

         break;
-      case MainThreadEventQueueTask::CoalesceResult::KeepSearching:
+      case MainThreadEventQueueTask::NotifyResult::KeepIterating:
         continue;
     }
     break;