Factor out dependncy on download throttling from core download code.

chrome/chrome_browser.gypi

 # Copyright (c) 2011 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'dependencies': [
@@ skipping 850 matching lines @@
         'browser/download/download_history.h',
         'browser/download/download_item_model.cc',
         'browser/download/download_item_model.h',
         'browser/download/download_manager_delegate.h',
         'browser/download/download_prefs.cc',
         'browser/download/download_prefs.h',
         'browser/download/download_request_infobar_delegate.cc',
         'browser/download/download_request_infobar_delegate.h',
         'browser/download/download_request_limiter.cc',
         'browser/download/download_request_limiter.h',
+        'browser/download/download_request_limiter_observer.cc',
+        'browser/download/download_request_limiter_observer.h',
         'browser/download/download_safe_browsing_client.cc',
         'browser/download/download_safe_browsing_client.h',
         'browser/download/download_shelf.h',
         'browser/download/download_shelf_context_menu.cc',
         'browser/download/download_shelf_context_menu.h',
         'browser/download/download_started_animation.h',
+        'browser/download/download_throttling_resource_handler.cc',
+        'browser/download/download_throttling_resource_handler.h',
         'browser/download/download_util.cc',
         'browser/download/download_util.h',
         'browser/download/drag_download_file.cc',
         'browser/download/drag_download_file.h',
         'browser/download/drag_download_util.cc',
         'browser/download/drag_download_util.h',
         'browser/download/save_package_file_picker.cc',
         'browser/download/save_package_file_picker.h',
         'browser/enumerate_modules_model_win.cc',
         'browser/enumerate_modules_model_win.h',
@@ skipping 973 matching lines @@
         'browser/renderer_host/accelerated_plugin_view_mac.h',
         'browser/renderer_host/accelerated_plugin_view_mac.mm',
         'browser/renderer_host/accelerated_surface_container_touch.cc',
         'browser/renderer_host/accelerated_surface_container_touch.h',
         'browser/renderer_host/chrome_render_message_filter.cc',
         'browser/renderer_host/chrome_render_message_filter.h',
         'browser/renderer_host/chrome_render_view_host_observer.cc',
         'browser/renderer_host/chrome_render_view_host_observer.h',
         'browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc',
         'browser/renderer_host/chrome_resource_dispatcher_host_delegate.h',
-        'browser/renderer_host/download_throttling_resource_handler.cc',
-        'browser/renderer_host/download_throttling_resource_handler.h',
         'browser/renderer_host/gtk_im_context_wrapper.cc',
         'browser/renderer_host/gtk_im_context_wrapper.h',
         'browser/renderer_host/gtk_key_bindings_handler.cc',
         'browser/renderer_host/gtk_key_bindings_handler.h',
         'browser/renderer_host/offline_resource_handler.cc',
         'browser/renderer_host/offline_resource_handler.h',
         'browser/renderer_host/render_widget_host_view_gtk.cc',
         'browser/renderer_host/render_widget_host_view_gtk.h',
         'browser/renderer_host/render_widget_host_view_mac.h',
         'browser/renderer_host/render_widget_host_view_mac.mm',
@@ skipping 3136 matching lines @@
               # weak imports in dependents, who still must #include
               # closure_blocks_leopard_compat.h to get weak imports.
               'type': 'none',
             }],
           ],
         },
       ],
     }],
   ],
 }