WIP Add getCoalescedEvents API using vector of WebInputEvents

content/common/input/event_with_latency_info.cc

Index: content/common/input/event_with_latency_info.cc
diff --git a/content/common/input/event_with_latency_info.cc b/content/common/input/event_with_latency_info.cc
index bafa99e15ad2befeed972416825e382cf57e45e5..7cae5380edac8ba8e03a307ef362d25270997694 100644
--- a/content/common/input/event_with_latency_info.cc
+++ b/content/common/input/event_with_latency_info.cc
@@ -262,16 +262,17 @@ void Coalesce(const blink::WebInputEvent& event_to_coalesce,
 }  // namespace internal
 
 ScopedWebInputEventWithLatencyInfo::ScopedWebInputEventWithLatencyInfo(
-    ui::ScopedWebInputEvent event,
+    blink::CoalescedWebInputEvent::ScopedWebInputEvent event,
     const ui::LatencyInfo& latency_info)
-    : event_(std::move(event)), latency_(latency_info) {
-}
+    : event_(new blink::CoalescedWebInputEvent(std::move(event))),
+      latency_(latency_info) {}
 
 ScopedWebInputEventWithLatencyInfo::~ScopedWebInputEventWithLatencyInfo() {}
 
 bool ScopedWebInputEventWithLatencyInfo::CanCoalesceWith(
     const ScopedWebInputEventWithLatencyInfo& other) const {
-  return internal::CanCoalesce(other.event(), event());
+  return internal::CanCoalesce(other.coalescedEvent().event(),
+                               coalescedEvent().event());
 }
 
 void ScopedWebInputEventWithLatencyInfo::CoalesceWith(
@@ -282,9 +283,14 @@ void ScopedWebInputEventWithLatencyInfo::CoalesceWith(
 
   // New events get coalesced into older events, and the newer timestamp
   // should always be preserved.
-  const double time_stamp_seconds = other.event().timeStampSeconds;
-  internal::Coalesce(other.event(), event_.get());
-  event_->timeStampSeconds = time_stamp_seconds;
+  const double time_stamp_seconds =
+      other.coalescedEvent().event().timeStampSeconds;
+
+  // The new event will have no coalesced events itself. So we do not copy all
+  // the coalesced event over here.
+  event_->addCoalescedEvent(other.coalescedEvent().event());
+  internal::Coalesce(other.coalescedEvent().event(), event_->eventPointer());
+  event_->eventPointer()->timeStampSeconds = time_stamp_seconds;
 
   // When coalescing two input events, we keep the oldest LatencyInfo
   // since it will represent the longest latency.
@@ -292,11 +298,13 @@ void ScopedWebInputEventWithLatencyInfo::CoalesceWith(
   other.latency_.set_coalesced();
 }
 
-const blink::WebInputEvent& ScopedWebInputEventWithLatencyInfo::event() const {
+const blink::CoalescedWebInputEvent&
+ScopedWebInputEventWithLatencyInfo::coalescedEvent() const {
   return *event_;
 }
 
-blink::WebInputEvent& ScopedWebInputEventWithLatencyInfo::event() {
+blink::CoalescedWebInputEvent&
+ScopedWebInputEventWithLatencyInfo::coalescedEvent() {
   return *event_;
 }