Keep track of coalesced events in main thread event queue

content/browser/renderer_host/render_widget_host_unittest.cc

 // Copyright (c) 2012 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 <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <tuple>
 
@@ skipping 1556 matching lines @@
                                         int64_t component_id,
                                         WebInputEvent::Type expected_type) {
   EXPECT_EQ(process->sink().message_count(), 1U);
 
   const IPC::Message* message = process->sink().GetMessageAt(0);
   EXPECT_EQ(InputMsg_HandleInputEvent::ID, message->type());
   InputMsg_HandleInputEvent::Param params;
   EXPECT_TRUE(InputMsg_HandleInputEvent::Read(message, &params));
 
   const WebInputEvent* event = std::get<0>(params);
-  ui::LatencyInfo latency_info = std::get<1>(params);
+  ui::LatencyInfo latency_info = std::get<2>(params);
 
   EXPECT_TRUE(event->type() == expected_type);
   EXPECT_TRUE(latency_info.FindLatency(
       ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT, component_id, NULL));
 
   process->sink().ClearMessages();
 }
 
 // Tests that after input event passes through RWHI through ForwardXXXEvent()
 // or ForwardXXXEventWithLatencyInfo(), LatencyInfo component
@@ skipping 126 matching lines @@
                                       ui::LatencyInfo());
 
 
   // Tests RWHI::ForwardWheelEventWithLatencyInfo().
   SimulateWheelEventWithLatencyInfo(-5, 0, 0, true, ui::LatencyInfo());
 
   ASSERT_FALSE(host_->input_router()->HasPendingEvents());
 }
 
 }  // namespace content