Move files video_capture*.* from media/base to media/capture

media/base/video_capturer_source.cc

-// Copyright 2015 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/base/video_capturer_source.h"
-
-namespace media {
-
-// TODO(mcasas): VideoCapturerSource is implemented in other .dll(s) (e.g.
-// content) in Windows component build. The current compiler fails to generate
-// object files for this destructor if it's defined in the header file and that
-// breaks linking. Consider removing this file when the compiler+linker is able
-// to generate symbols across linking units.
-VideoCapturerSource::~VideoCapturerSource() {}
-
-}  // namespace media