Move chrome/browser/manifest to content/browser.

chrome/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 545 matching lines @@
     "mac/mac_startup_profiler.cc",
     "mac/mac_startup_profiler.h",
     "mac/master_prefs.h",
     "mac/master_prefs.mm",
     "mac/nsprocessinfo_additions.h",
     "mac/nsprocessinfo_additions.mm",
     "mac/relauncher.h",
     "mac/relauncher.mm",
     "mac/security_wrappers.cc",
     "mac/security_wrappers.h",
-    "manifest/manifest_icon_downloader.cc",
-    "manifest/manifest_icon_downloader.h",
-    "manifest/manifest_icon_selector.cc",
-    "manifest/manifest_icon_selector.h",
     "media/cast_remoting_connector.cc",
     "media/cast_remoting_connector.h",
     "media/cast_remoting_connector_messaging.cc",
     "media/cast_remoting_connector_messaging.h",
     "media/cast_remoting_sender.cc",
     "media/cast_remoting_sender.h",
     "media/media_access_handler.cc",
     "media/media_access_handler.h",
     "media/media_device_id_salt.cc",
     "media/media_device_id_salt.h",
@@ skipping 4224 matching lines @@
       "//components/search_engines",
       "//rlz:rlz_lib",
     ]
   }
 }
 
 service_manifest("preferences_forwarder_manifest") {
   name = "preferences_forwarder"
   source = "prefs/forwarder_manifest.json"
 }