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

gpu/ipc/service/image_transport_surface_overlay_mac.mm

 // 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 "gpu/ipc/service/image_transport_surface_overlay_mac.h"
 
 #include <CoreGraphics/CoreGraphics.h>
 #include <IOSurface/IOSurface.h>
 #include <OpenGL/CGLRenderers.h>
 #include <OpenGL/CGLTypes.h>
@@ skipping 237 matching lines @@
         pixel_damage_rect, &fullscreen_low_power_layer_valid);
   }
 
   base::TimeTicks after_transaction_time = base::TimeTicks::Now();
   UMA_HISTOGRAM_TIMES("GPU.IOSurface.CATransactionTime",
                       after_transaction_time - after_flush_before_commit_time);
 
   // Update the latency info to reflect the swap time.
   for (auto& latency_info : latency_info_) {
     latency_info.AddLatencyNumberWithTimestamp(
-        ui::INPUT_EVENT_GPU_SWAP_BUFFER_COMPONENT, 0, 0,
+        ui::INPUT_EVENT_GPU_SWAP_BUFFER_COMPONENT, 0,
         after_flush_before_commit_time, 1);
     latency_info.AddLatencyNumberWithTimestamp(
-        ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT, 0, 0,
+        ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT, 0,
         after_flush_before_commit_time, 1);
   }
 
   // Send acknowledgement to the browser.
   CAContextID ca_context_id = 0;
   CAContextID fullscreen_low_power_ca_context_id = 0;
   gfx::ScopedRefCountedIOSurfaceMachPort io_surface_mach_port;
   if (use_remote_layer_api_) {
     ca_context_id = [ca_context_ contextId];
     fullscreen_low_power_ca_context_id =
@@ skipping 133 matching lines @@
   gl_renderer_id_ = context_renderer_id & kCGLRendererIDMatchingMask;
 
   // Post a task holding a reference to the new GL context. The reason for
   // this is to avoid creating-then-destroying the context for every image
   // transport surface that is observing the GPU switch.
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE, base::Bind(&IOSurfaceContextNoOp, context_on_new_gpu));
 }
 
 }  // namespace gpu