[Page Load Metrics] Add mojom file to page load metrics.

chrome/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/buildflag_header.gni")
 import("//build/util/process_version.gni")
 import("//chrome/common/features.gni")
 import("//chrome/process_version_rc_template.gni")  # For branding_file_path.
 import("//extensions/features/features.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
@@ skipping 92 matching lines @@
     "media/webrtc_logging_message_data.h",
     "media/webrtc_logging_messages.h",
     "media_galleries/metadata_types.h",
     "multi_process_lock.h",
     "multi_process_lock_linux.cc",
     "multi_process_lock_mac.cc",
     "multi_process_lock_win.cc",
     "origin_trials/chrome_origin_trial_policy.cc",
     "origin_trials/chrome_origin_trial_policy.h",
     "page_load_metrics/page_load_metrics_messages.h",
+    "page_load_metrics/page_load_metrics_param_traits.cc",
+    "page_load_metrics/page_load_metrics_param_traits.h",
     "page_load_metrics/page_load_timing.cc",
     "page_load_metrics/page_load_timing.h",
     "page_load_metrics/page_track_decider.cc",
     "page_load_metrics/page_track_decider.h",
     "partial_circular_buffer.cc",
     "partial_circular_buffer.h",
     "pause_tabs_field_trial.h",
     "pref_names_util.cc",
     "pref_names_util.h",
     "prerender_messages.h",
@@ skipping 31 matching lines @@
   defines = []
 
   configs += [
     "//build/config:precompiled_headers",
     "//build/config/compiler:wexit_time_destructors",
   ]
 
   public_deps = [
     ":features",
     ":mojo_bindings",
+    ":page_load_metrics_mojom",
     "//base:base",
     "//base:base_static",
     "//base:i18n",
     "//chrome:resources",
     "//chrome:strings",
     "//chrome/app/theme:theme_resources",
     "//chrome/common:constants",
     "//chrome/common/media_router/mojo:dial_utility_interfaces",
     "//chrome/common/net",
     "//chrome/common/safe_browsing:proto",
@@ skipping 560 matching lines @@
 mojom("instant_mojom") {
   sources = [
     "instant.mojom",
   ]
 
   public_deps = [
     "//mojo/common:common_custom_types",
     "//url/mojo:url_mojom_gurl",
   ]
 }
+
+mojom("page_load_metrics_mojom") {
+  sources = [
+    "page_load_metrics/page_load_metrics.mojom",
+  ]
+
+  public_deps = [
+    "//mojo/common:common_custom_types",
+  ]
+}