mus: Initialize WindowManagerConnection in chrome instead of in content.

content/browser/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/features.gni")
 import("//build/config/ui.gni")
 import("//content/browser/browser.gni")
 import("//media/media_options.gni")
 
 source_set("browser") {
@@ skipping 386 matching lines @@
   }
 
   if (use_aura) {
     deps += [
       "//components/bitmap_uploader",
       "//components/mus/public/cpp",
       "//components/mus/public/interfaces",
       "//ui/aura",
       "//ui/aura_extra",
       "//ui/strings",
-      "//ui/views/mus:for_component",
       "//ui/wm",
     ]
     sources += [
       "compositor/software_output_device_mus.cc",
       "compositor/software_output_device_mus.h",
       "renderer_host/render_widget_host_view_mus.cc",
       "renderer_host/render_widget_host_view_mus.h",
       "web_contents/web_contents_view_mus.cc",
       "web_contents/web_contents_view_mus.h",
     ]
@@ skipping 106 matching lines @@
   if (!is_component_build) {
     public_deps = [
       ":browser",
     ]
   } else {
     public_deps = [
       "//third_party/leveldatabase",
     ]
   }
 }