Keep track of coalesced events in main thread event queue

third_party/WebKit/Source/platform/exported/WebCoalescedInputEvent.cpp

Index: third_party/WebKit/Source/platform/exported/WebCoalescedInputEvent.cpp
diff --git a/third_party/WebKit/Source/platform/exported/WebCoalescedInputEvent.cpp b/third_party/WebKit/Source/platform/exported/WebCoalescedInputEvent.cpp
index 0ae61f0ebd041bb458c94b3741d1adb4fec722c1..cf6c6d8b3cb8679c80771d5f56a25e6ba6ca8d29 100644
--- a/third_party/WebKit/Source/platform/exported/WebCoalescedInputEvent.cpp
+++ b/third_party/WebKit/Source/platform/exported/WebCoalescedInputEvent.cpp
@@ -88,8 +88,9 @@ size_t WebCoalescedInputEvent::coalescedEventSize() const {
   return m_coalescedEvents.size();
 }
 
-const WebInputEvent* WebCoalescedInputEvent::coalescedEvent(int index) const {
-  return m_coalescedEvents[index].get();
+const WebInputEvent& WebCoalescedInputEvent::coalescedEvent(
+    size_t index) const {
+  return *m_coalescedEvents[index].get();
 }
 
 std::vector<const WebInputEvent*>
@@ -114,7 +115,7 @@ WebCoalescedInputEvent::WebCoalescedInputEvent(const WebInputEvent& event)
 WebCoalescedInputEvent::WebCoalescedInputEvent(
     const WebInputEvent& event,
     const std::vector<const WebInputEvent*>& coalescedEvents)
-    : m_event(), m_coalescedEvents(coalescedEvents.size()) {
+    : m_event(), m_coalescedEvents() {
   m_event = makeWebScopedInputEvent(event);
   for (const auto& coalescedEvent : coalescedEvents)
     m_coalescedEvents.push_back(makeWebScopedInputEvent(*coalescedEvent));