Don't restart the hang renderer timeout on messages ack'd from the compositor thread.

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("//tools/ipc_fuzzer/ipc_fuzzer.gni")
 if (is_mac) {
@@ skipping 141 matching lines @@
     "indexed_db/indexed_db_struct_traits.cc",
     "indexed_db/indexed_db_struct_traits.h",
     "input/event_with_latency_info.cc",
     "input/event_with_latency_info.h",
     "input/gesture_event_stream_validator.cc",
     "input/gesture_event_stream_validator.h",
     "input/input_event.cc",
     "input/input_event.h",
     "input/input_event_ack.cc",
     "input/input_event_ack.h",
+    "input/input_event_ack_source.h",
+    "input/input_event_ack_state.h",
     "input/input_event_dispatch_type.h",
     "input/input_event_stream_validator.cc",
     "input/input_event_stream_validator.h",
     "input/input_param_traits.cc",
     "input/input_param_traits.h",
     "input/synthetic_gesture_packet.cc",
     "input/synthetic_gesture_packet.h",
     "input/synthetic_gesture_params.cc",
     "input/synthetic_gesture_params.h",
     "input/synthetic_pinch_gesture_params.cc",
@@ skipping 430 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"
 }