WIP Add getCoalescedEvents API using vector of WebInputEvents

ui/events/blink/input_handler_proxy.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/events/blink/input_handler_proxy.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 244 matching lines @@
 
 InputHandlerProxy::~InputHandlerProxy() {}
 
 void InputHandlerProxy::WillShutdown() {
   scroll_elasticity_controller_.reset();
   input_handler_ = NULL;
   client_->WillShutdown();
 }
 
 void InputHandlerProxy::HandleInputEventWithLatencyInfo(
-    ScopedWebInputEvent event,
+    blink::ScopedCoalescedWebInputEvent coalescedEvent,
     const LatencyInfo& latency_info,
     const EventDispositionCallback& callback) {
   DCHECK(input_handler_);
 
   if (uma_latency_reporting_enabled_)
-    ReportInputEventLatencyUma(*event, latency_info);
+    ReportInputEventLatencyUma(coalescedEvent->event(), latency_info);
 
   TRACE_EVENT_WITH_FLOW1("input,benchmark", "LatencyInfo.Flow",
                          TRACE_ID_DONT_MANGLE(latency_info.trace_id()),
                          TRACE_EVENT_FLAG_FLOW_IN | TRACE_EVENT_FLAG_FLOW_OUT,
                          "step", "HandleInputEventImpl");
 
   ui::LatencyInfo monitored_latency_info = latency_info;
   std::unique_ptr<cc::SwapPromiseMonitor> latency_info_swap_promise_monitor =
       input_handler_->CreateLatencyInfoSwapPromiseMonitor(
           &monitored_latency_info);
 
   current_overscroll_params_.reset();
-  InputHandlerProxy::EventDisposition disposition = HandleInputEvent(*event);
+  InputHandlerProxy::EventDisposition disposition =
+      HandleInputEvent(coalescedEvent->event());
   callback.Run(disposition, std::move(event), monitored_latency_info,
                std::move(current_overscroll_params_));
 }
 
 InputHandlerProxy::EventDisposition InputHandlerProxy::HandleInputEvent(
     const WebInputEvent& event) {
   DCHECK(input_handler_);
 
   if (FilterInputEventForFlingBoosting(event))
     return DID_HANDLE;
@@ skipping 1121 matching lines @@
   // is made asynchronously, to minimize divergence between main thread and
   // impl thread event handling paths.
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(&InputScrollElasticityController::ObserveGestureEventAndResult,
                  scroll_elasticity_controller_->GetWeakPtr(), gesture_event,
                  scroll_result));
 }
 
 }  // namespace ui