Clean up a few more unused globals.

content/browser/renderer_host/media/desktop_capture_device.cc

 // Copyright (c) 2013 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 "content/browser/renderer_host/media/desktop_capture_device.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/sequenced_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/common/desktop_media_id.h"
 #include "media/base/video_util.h"
 #include "third_party/libyuv/include/libyuv/scale_argb.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_capturer.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
 #include "third_party/webrtc/modules/desktop_capture/screen_capturer.h"
 #include "third_party/webrtc/modules/desktop_capture/window_capturer.h"
 
 namespace content {
 
 namespace {
 
-const int kBytesPerPixel = 4;
-
 webrtc::DesktopRect ComputeLetterboxRect(
     const webrtc::DesktopSize& max_size,
     const webrtc::DesktopSize& source_size) {
   gfx::Rect result = media::ComputeLetterboxRegion(
       gfx::Rect(0, 0, max_size.width(), max_size.height()),
       gfx::Size(source_size.width(), source_size.height()));
   return webrtc::DesktopRect::MakeLTRB(
       result.x(), result.y(), result.right(), result.bottom());
 }
 
@@ skipping 413 matching lines @@
 
 void DesktopCaptureDevice::DeAllocate() {
   core_->DeAllocate();
 }
 
 const media::VideoCaptureDevice::Name& DesktopCaptureDevice::device_name() {
   return name_;
 }
 
 }  // namespace content