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

ui/latency/mojo/struct_traits_unittest.cc

Index: ui/latency/mojo/struct_traits_unittest.cc
diff --git a/ui/latency/mojo/struct_traits_unittest.cc b/ui/latency/mojo/struct_traits_unittest.cc
index 2dbcc3a246d78d3b668724b92c08cd0b642d5205..98dcf9a045dff9e7453c2fd1764c361624d0a704 100644
--- a/ui/latency/mojo/struct_traits_unittest.cc
+++ b/ui/latency/mojo/struct_traits_unittest.cc
@@ -51,17 +51,14 @@ class StructTraitsTest : public testing::Test, public mojom::TraitsTestService {
 }  // namespace
 
 TEST_F(StructTraitsTest, LatencyComponent) {
-  const int64_t sequence_number = 13371337;
   const base::TimeTicks event_time = base::TimeTicks::Now();
   const uint32_t event_count = 1234;
   LatencyInfo::LatencyComponent input;
-  input.sequence_number = sequence_number;
   input.event_time = event_time;
   input.event_count = event_count;
   mojom::TraitsTestServicePtr proxy = GetTraitsTestProxy();
   LatencyInfo::LatencyComponent output;
   proxy->EchoLatencyComponent(input, &output);
-  EXPECT_EQ(sequence_number, output.sequence_number);
   EXPECT_EQ(event_time, output.event_time);
   EXPECT_EQ(event_count, output.event_count);
 }
@@ -82,10 +79,10 @@ TEST_F(StructTraitsTest, LatencyInfo) {
   LatencyInfo latency;
   latency.set_trace_id(5);
   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(5, latency.trace_id());
   EXPECT_TRUE(latency.terminated());
@@ -106,7 +103,6 @@ TEST_F(StructTraitsTest, LatencyInfo) {
   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(