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..ff78f0025f527f3fac7f1fb0d01f6e5119e51d50 100644
--- a/content/common/input/event_with_latency_info.cc
+++ b/content/common/input/event_with_latency_info.cc
@@ -259,12 +259,37 @@ void Coalesce(const blink::WebInputEvent& event_to_coalesce,
   }
 }
 
+ui::ScopedWebInputEvent makeDeepCopyUniquePtr(
+    const blink::WebInputEvent& event) {
+  if (blink::WebInputEvent::isGestureEventType(event.type)) {
+    return ui::ScopedWebInputEvent(new blink::WebGestureEvent(
+        static_cast<const blink::WebGestureEvent&>(event)));
+  }
+  if (blink::WebInputEvent::isMouseEventType(event.type)) {
+    return ui::ScopedWebInputEvent(new blink::WebMouseEvent(
+        static_cast<const blink::WebMouseEvent&>(event)));
+  }
+  if (blink::WebInputEvent::isTouchEventType(event.type)) {
+    return ui::ScopedWebInputEvent(new blink::WebTouchEvent(
+        static_cast<const blink::WebTouchEvent&>(event)));
+  }
+  if (event.type == blink::WebInputEvent::MouseWheel) {
+    return ui::ScopedWebInputEvent(new blink::WebMouseWheelEvent(
+        static_cast<const blink::WebMouseWheelEvent&>(event)));
+  }
+  NOTREACHED();
+  return ui::ScopedWebInputEvent();
+}
+
 }  // namespace internal
 
 ScopedWebInputEventWithLatencyInfo::ScopedWebInputEventWithLatencyInfo(
     ui::ScopedWebInputEvent event,
     const ui::LatencyInfo& latency_info)
-    : event_(std::move(event)), latency_(latency_info) {
+    : event_(internal::makeDeepCopyUniquePtr(*event.get())),
+      latency_(latency_info) {
+  scopedCoalescedEvents_.push_back(std::move(event));
+  coalescedEvents_.push_back(scopedCoalescedEvents_.back().get());
 }
 
 ScopedWebInputEventWithLatencyInfo::~ScopedWebInputEventWithLatencyInfo() {}
@@ -283,6 +308,9 @@ 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;
+  scopedCoalescedEvents_.push_back(
+      internal::makeDeepCopyUniquePtr(other.event()));
+  coalescedEvents_.push_back(scopedCoalescedEvents_.back().get());
   internal::Coalesce(other.event(), event_.get());
   event_->timeStampSeconds = time_stamp_seconds;
 
@@ -300,4 +328,9 @@ blink::WebInputEvent& ScopedWebInputEventWithLatencyInfo::event() {
   return *event_;
 }
 
+const std::vector<const blink::WebInputEvent*>&
+ScopedWebInputEventWithLatencyInfo::coalescedEvents() {
+  return coalescedEvents_;
+}
+
 }  // namespace content