Adding instrumentation to locate the source of jankiness.

device/hid/hid_connection_win.cc

 // Copyright (c) 2014 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 "device/hid/hid_connection_win.h"
 
 #include <cstring>
 
 #include "base/bind.h"
 #include "base/files/file.h"
@@ skipping 73 matching lines @@
     watcher_.StartWatching(event_.Get(), this);
   } else {
     VPLOG(1) << "HID transfer failed";
     callback_.Run(this, false);
   }
 }
 
 void PendingHidTransfer::OnObjectSignaled(HANDLE event_handle) {
   // TODO(vadimt): Remove ScopedTracker below once crbug.com/418183 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION("PendingHidTransfer_OnObjectSignaled"));
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "418183 PendingHidTransfer::OnObjectSignaled"));
 
   callback_.Run(this, true);
   Release();
 }
 
 void PendingHidTransfer::WillDestroyCurrentMessageLoop() {
   watcher_.StopWatching();
   callback_.Run(this, false);
 }
 
@@ skipping 136 matching lines @@
   if (GetOverlappedResult(
           file_.Get(), transfer->GetOverlapped(), &bytes_transferred, FALSE)) {
     callback.Run(true);
   } else {
     VPLOG(1) << "HID write failed";
     callback.Run(false);
   }
 }
 
 }  // namespace device