Move blink scheduler implementation into a component

content/child/BUILD.gn

 # Copyright 2014 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/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//content/child/child.gni")
 
 source_set("child") {
@@ skipping 92 matching lines @@
     "//content:content_implementation",
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 
   if (is_ios) {
     # iOS only needs a small portion of content; exclude all the
     # implementation, and re-include what is used.
     sources = []
   } else {
     deps += [
+      "//components/scheduler:scheduler",
       "//content/app/resources",
       "//content/app/strings",
       "//crypto:platform",
       "//storage/common",
       "//third_party/WebKit/public:blink",
       "//third_party/WebKit/public:image_resources",
       "//third_party/WebKit/public:resources",
       "//third_party/npapi",
     ]
   }
 
   if (use_aura && is_mac) {
     # This file is already excluded on non-Mac.
     sources -= [ "npapi/webplugin_delegate_impl_mac.mm" ]
   }
 
   if (is_win || !use_aura) {
     sources -= [ "npapi/webplugin_delegate_impl_aura.cc" ]
   }
 }