Adding ThreadChecker validation to d'tors for host classes

remoting/host/linux/x11_character_injector.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 "remoting/host/linux/x11_character_injector.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "remoting/host/linux/x11_keyboard.h"
@@ skipping 26 matching lines @@
 X11CharacterInjector::X11CharacterInjector(
     std::unique_ptr<X11Keyboard> keyboard)
     : keyboard_(std::move(keyboard)) {
   std::vector<uint32_t> keycodes = keyboard_->GetUnusedKeycodes();
   for (int keycode : keycodes) {
     available_keycodes_.push_back({keycode, base::TimeTicks()});
   }
 }
 
 X11CharacterInjector::~X11CharacterInjector() {
+  DCHECK(thread_checker_.CalledOnValidThread());
   // Clear all used key mappings.
   for (const KeyInfo& info : available_keycodes_) {
     if (!info.expire_at.is_null()) {
       keyboard_->ChangeKeyMapping(info.keycode, 0);
     }
   }
   keyboard_->Sync();
 }
 
 void X11CharacterInjector::Inject(uint32_t code_point) {
@@ skipping 78 matching lines @@
 void X11CharacterInjector::ResetKeyInfoExpirationTime(
     base::TimeTicks now,
     std::vector<KeyInfo>::iterator position) {
   KeyInfo info = *position;
   info.expire_at = now + kMappingExpireDuration;
   available_keycodes_.erase(position);
   available_keycodes_.push_back(info);
 }
 
 }  // namespace remoting