Make reprioritization IPC batch rather than per-request.

content/common/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("//media/media_options.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//ppapi/features/features.gni")
 import("//tools/ipc_fuzzer/ipc_fuzzer.gni")
@@ skipping 236 matching lines @@
     "plugin_list.cc",
     "plugin_list.h",
     "process_type.cc",
     "push_messaging_messages.h",
     "quota_messages.h",
     "render_process_messages.h",
     "resize_params.cc",
     "resize_params.h",
     "resource_messages.cc",
     "resource_messages.h",
+    "resource_priority_change_info.cc",
+    "resource_priority_change_info.h",
     "resource_request.cc",
     "resource_request.h",
     "resource_request_body_impl.cc",
     "resource_request_body_impl.h",
     "resource_request_completion_status.cc",
     "resource_request_completion_status.h",
     "sandbox_init_mac.cc",
     "sandbox_init_mac.h",
     "sandbox_init_win.cc",
     "sandbox_linux/android/sandbox_bpf_base_policy_android.cc",
@@ skipping 341 matching lines @@
     "//ui/gfx/geometry/mojo",
     "//ui/gfx/mojo",
     "//url/mojo:url_mojom_gurl",
     "//url/mojo:url_mojom_origin",
   ]
 
   export_class_attribute = "CONTENT_EXPORT"
   export_define = "CONTENT_IMPLEMENTATION=1"
   export_header = "content/common/content_export.h"
 }