Move ThreadWrapper to ProcessThread in base.

webrtc/modules/video_render/ios/video_render_ios_gles20.mm

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 14 matching lines @@
       screen_update_event_(0),
       view_(view),
       window_rect_(),
       window_width_(0),
       window_height_(0),
       is_full_screen_(full_screen),
       agl_channels_(),
       z_order_to_channel_(),
       gles_context_([view context]),
       is_rendering_(true) {
-  screen_update_thread_ = ThreadWrapper::CreateThread(
+  screen_update_thread_ = PlatformThread::CreateThread(
       ScreenUpdateThreadProc, this, "ScreenUpdateGles20");
   screen_update_event_ = EventTimerWrapper::Create();
   GetWindowRect(window_rect_);
 }
 
 VideoRenderIosGles20::~VideoRenderIosGles20() {
   // Signal event to exit thread, then delete it
-  ThreadWrapper* thread_wrapper = screen_update_thread_.release();
+  PlatformThread* thread_wrapper = screen_update_thread_.release();
 
   if (thread_wrapper) {
     screen_update_event_->Set();
     screen_update_event_->StopTimer();
 
     thread_wrapper->Stop();
     delete thread_wrapper;
     delete screen_update_event_;
     screen_update_event_ = NULL;
     is_rendering_ = FALSE;
@@ skipping 222 matching lines @@
     if (counter == stream_id) {
       VideoRenderIosChannel* agl_channel = it->second;
       agl_channel->SetStreamSettings(0, left, top, right, bottom);
     }
     counter++;
     it++;
   }
 
   return 0;
 }