Replace the DownloadFileManager with direct ownership of DownloadFile.

content/content_browser.gypi

 # Copyright (c) 2012 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.
 
 {
   'dependencies': [
     'browser/debugger/devtools_resources.gyp:devtools_resources',
     'browser/speech/proto/speech_proto.gyp:speech_proto',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
@@ skipping 51 matching lines @@
     'public/browser/devtools_agent_host_registry.h',
     'public/browser/devtools_client_host.h',
     'public/browser/download_danger_type.h',
     'public/browser/download_id.h',
     'public/browser/devtools_frontend_host_delegate.h',
     'public/browser/devtools_http_handler.h',
     'public/browser/devtools_http_handler_delegate.h',
     'public/browser/devtools_manager.h',
     'public/browser/dom_operation_notification_details.h',
     'public/browser/dom_storage_context.h',
+    'public/browser/download_destination_observer.h',
     'public/browser/download_interrupt_reason_values.h',
     'public/browser/download_interrupt_reasons.h',
     'public/browser/download_item.h',
     'public/browser/download_manager.h',
     'public/browser/download_manager_delegate.cc',
     'public/browser/download_manager_delegate.h',
     'public/browser/download_persistent_store_info.cc',
     'public/browser/download_persistent_store_info.h',
     'public/browser/download_save_info.cc',
     'public/browser/download_save_info.h',
@@ skipping 222 matching lines @@
     'browser/dom_storage/dom_storage_message_filter.h',
     'browser/dom_storage/session_storage_namespace_impl.cc',
     'browser/dom_storage/session_storage_namespace_impl.h',
     'browser/download/base_file.cc',
     'browser/download/base_file.h',
     'browser/download/byte_stream.cc',
     'browser/download/byte_stream.h',
     'browser/download/download_create_info.cc',
     'browser/download/download_create_info.h',
     'browser/download/download_file.h',
+    'browser/download/download_file_factory.cc',
+    'browser/download/download_file_factory.h',
     'browser/download/download_file_impl.cc',
     'browser/download/download_file_impl.h',
-    'browser/download/download_file_manager.cc',
-    'browser/download/download_file_manager.h',
     'browser/download/download_interrupt_reasons_impl.cc',
     'browser/download/download_interrupt_reasons_impl.h',
     'browser/download/download_item_factory.h',
     'browser/download/download_item_impl.cc',
     'browser/download/download_item_impl.h',
     'browser/download/download_item_impl_delegate.cc',
     'browser/download/download_item_impl_delegate.h',
     'browser/download/download_manager_impl.cc',
     'browser/download/download_manager_impl.h',
     'browser/download/download_net_log_parameters.cc',
@@ skipping 685 matching lines @@
         ['exclude', '^browser/renderer_host/java/'],
       ],
     }],
     ['input_speech==0', {
       'sources/': [
         ['exclude', '^browser/speech/'],
       ],
     }],
   ],
 }