Move chrome/browser/manifest to content/browser.

chrome/test/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/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 3067 matching lines @@
     "../browser/install_verification/win/module_verification_test.cc",
     "../browser/install_verification/win/module_verification_test.h",
     "../browser/installable/installable_manager_unittest.cc",
     "../browser/internal_auth_unittest.cc",
     "../browser/io_thread_unittest.cc",
     "../browser/loader/chrome_navigation_data_unittest.cc",
     "../browser/loader/chrome_resource_dispatcher_host_delegate_unittest.cc",
     "../browser/logging_chrome_unittest.cc",
     "../browser/mac/exception_processor_unittest.mm",
     "../browser/mac/keystone_glue_unittest.mm",
-    "../browser/manifest/manifest_icon_downloader_unittest.cc",
-    "../browser/manifest/manifest_icon_selector_unittest.cc",
     "../browser/media/android/router/media_router_android_unittest.cc",
     "../browser/media/cast_remoting_connector_unittest.cc",
     "../browser/media/media_engagement_contents_observer_unittest.cc",
     "../browser/media/midi_permission_context_unittest.cc",
     "../browser/media/midi_sysex_permission_context_unittest.cc",
     "../browser/media/router/browser_presentation_connection_proxy_unittest.cc",
     "../browser/media/router/create_presentation_connection_request_unittest.cc",
     "../browser/media/router/issue_manager_unittest.cc",
     "../browser/media/router/media_router_base_unittest.cc",
     "../browser/media/router/media_router_dialog_controller_unittest.cc",
@@ skipping 2048 matching lines @@
 }
 
 if (is_win) {
   loadable_module("conflicts_dll") {
     testonly = true
     sources = [
       "conflicts/conflicts_dll.cc",
     ]
   }
 }