Remove LatencyInfo::sequence_number. (May break metrics).

ui/latency/ipc/latency_info_param_traits_unittest.cc

 // Copyright 2015 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 "ipc/ipc_message_macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/ipc/geometry/gfx_param_traits.h"
 #include "ui/latency/ipc/latency_info_param_traits.h"
 #include "ui/latency/ipc/latency_info_param_traits_macros.h"
 
 namespace ui {
 
 TEST(LatencyInfoParamTraitsTest, Basic) {
   LatencyInfo latency;
   ASSERT_FALSE(latency.terminated());
-  latency.AddLatencyNumber(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 1234, 0);
-  latency.AddLatencyNumber(INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT, 1234, 100);
+  latency.AddLatencyNumber(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 1234);
+  latency.AddLatencyNumber(INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT, 1234);
   latency.AddLatencyNumber(INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT,
-                           1234, 0);
+                           1234);
 
-  EXPECT_EQ(100, latency.trace_id());
   EXPECT_TRUE(latency.terminated());
 
   IPC::Message msg(1, 2, IPC::Message::PRIORITY_NORMAL);
   IPC::WriteParam(&msg, latency);
   base::PickleIterator iter(msg);
   LatencyInfo output;
   EXPECT_TRUE(IPC::ReadParam(&msg, &iter, &output));
 
   EXPECT_EQ(latency.trace_id(), output.trace_id());
   EXPECT_EQ(latency.terminated(), output.terminated());
 
   EXPECT_TRUE(output.FindLatency(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
                                  1234,
                                  nullptr));
 
   LatencyInfo::LatencyComponent rwh_comp;
   EXPECT_TRUE(output.FindLatency(INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
                                  1234,
                                  &rwh_comp));
-  EXPECT_EQ(100, rwh_comp.sequence_number);
   EXPECT_EQ(1u, rwh_comp.event_count);
 
   EXPECT_TRUE(output.FindLatency(
       INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT, 1234, nullptr));
 }
 
 TEST(LatencyInfoParamTraitsTest, InvalidData) {
   IPC::Message msg(1, 2, IPC::Message::PRIORITY_NORMAL);
   IPC::WriteParam(&msg, std::string());
   ui::LatencyInfo::LatencyMap components;
   IPC::WriteParam(&msg, components);
   IPC::WriteParam(&msg, static_cast<int64_t>(1234));
   IPC::WriteParam(&msg, true);
 
   base::PickleIterator iter(msg);
   LatencyInfo output;
   EXPECT_FALSE(IPC::ReadParam(&msg, &iter, &output));
 }
 
 }  // namespace ui