LatencyInfo trace_id_ no longer dependent on sequence_number.

cc/ipc/struct_traits_unittest.cc

 // Copyright 2016 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 <utility>
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "cc/input/selection.h"
 #include "cc/ipc/copy_output_request_struct_traits.h"
@@ skipping 344 matching lines @@
   Selection<gfx::SelectionBound> selection;
   selection.start.SetEdge(gfx::PointF(1234.5f, 67891.f),
                           gfx::PointF(5432.1f, 1987.6f));
   selection.start.set_visible(true);
   selection.start.set_type(gfx::SelectionBound::CENTER);
   selection.end.SetEdge(gfx::PointF(1337.5f, 52124.f),
                         gfx::PointF(1234.3f, 8765.6f));
   selection.end.set_visible(false);
   selection.end.set_type(gfx::SelectionBound::RIGHT);
   ui::LatencyInfo latency_info;
+  latency_info.set_trace_id(5);
   latency_info.AddLatencyNumber(
       ui::LATENCY_BEGIN_SCROLL_LISTENER_UPDATE_MAIN_COMPONENT, 1337, 7331);
   std::vector<ui::LatencyInfo> latency_infos = {latency_info};
   std::vector<SurfaceId> referenced_surfaces;
   SurfaceId id(FrameSinkId(1234, 4321),
                LocalSurfaceId(5678, base::UnguessableToken::Create()));
   referenced_surfaces.push_back(id);
   std::vector<SurfaceId> activation_dependencies;
   SurfaceId id2(FrameSinkId(4321, 1234),
                 LocalSurfaceId(8765, base::UnguessableToken::Create()));
@@ skipping 872 matching lines @@
   EXPECT_EQ(v_plane_resource_id, out_quad->v_plane_resource_id());
   EXPECT_EQ(a_plane_resource_id, out_quad->a_plane_resource_id());
   EXPECT_EQ(color_space, out_quad->color_space);
   EXPECT_EQ(resource_offset, out_quad->resource_offset);
   EXPECT_EQ(resource_multiplier, out_quad->resource_multiplier);
   EXPECT_EQ(bits_per_channel, out_quad->bits_per_channel);
   EXPECT_EQ(require_overlay, out_quad->require_overlay);
 }
 
 }  // namespace cc