base: Support setting thread priorities generically.

media/filters/video_renderer_base.cc

 // Copyright (c) 2012 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 "media/filters/video_renderer_base.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/callback_helpers.h"
 #include "base/message_loop.h"
@@ skipping 30 matching lines @@
       playback_rate_(0),
       paint_cb_(paint_cb),
       set_opaque_cb_(set_opaque_cb),
       last_timestamp_(kNoTimestamp()) {
   DCHECK(!paint_cb_.is_null());
 }
 
 VideoRendererBase::~VideoRendererBase() {
   base::AutoLock auto_lock(lock_);
   CHECK(state_ == kStopped || state_ == kUninitialized) << state_;
-  CHECK_EQ(thread_, base::kNullThreadHandle);
+  CHECK(thread_ == base::kNullThreadHandle);
 }
 
 void VideoRendererBase::Play(const base::Closure& callback) {
   DCHECK(message_loop_->BelongsToCurrentThread());
   base::AutoLock auto_lock(lock_);
   DCHECK_EQ(kPrerolled, state_);
   state_ = kPlaying;
   callback.Run();
 }
 
@@ skipping 468 matching lines @@
   // Because we might remain in the prerolled state for an undetermined amount
   // of time (e.g., we seeked while paused), we'll paint the first prerolled
   // frame.
   if (!ready_frames_.empty())
     PaintNextReadyFrame_Locked();
 
   base::ResetAndReturn(&preroll_cb_).Run(PIPELINE_OK);
 }
 
 }  // namespace media