[Blink>Media] Moving autoplay logic to AutoplayPolicy

third_party/WebKit/Source/core/html/BUILD.gn

 # 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.
 
 import("//build/split_static_library.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 
 blink_core_sources("html") {
   split_count = 5
 
@@ skipping 371 matching lines @@
     "imports/HTMLImportLoader.h",
     "imports/HTMLImportState.h",
     "imports/HTMLImportStateResolver.cpp",
     "imports/HTMLImportStateResolver.h",
     "imports/HTMLImportTreeRoot.cpp",
     "imports/HTMLImportTreeRoot.h",
     "imports/HTMLImportsController.cpp",
     "imports/HTMLImportsController.h",
     "imports/LinkImport.cpp",
     "imports/LinkImport.h",
+    "media/AutoplayPolicy.cpp",
+    "media/AutoplayPolicy.h",
     "media/AutoplayUmaHelper.cpp",
     "media/AutoplayUmaHelper.h",
     "media/HTMLMediaElementControlsList.cpp",
     "media/HTMLMediaElementControlsList.h",
     "media/HTMLMediaSource.cpp",
     "media/HTMLMediaSource.h",
     "media/MediaControls.cpp",
     "media/MediaControls.h",
     "media/MediaCustomControlsFullscreenDetector.cpp",
     "media/MediaCustomControlsFullscreenDetector.h",
@@ skipping 138 matching lines @@
     "track/vtt/VTTToken.h",
     "track/vtt/VTTTokenizer.cpp",
     "track/vtt/VTTTokenizer.h",
   ]
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 }