Add support for single sample metrics.

content/renderer/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/chromecast_build.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//content/common/features.gni")
 import("//media/media_options.gni")
@@ skipping 416 matching lines @@
     "//base:i18n",
     "//cc",
     "//cc/animation",
     "//cc/blink",
     "//cc/ipc",
     "//cc/paint",
     "//cc/surfaces",
     "//cc/surfaces:surface_id",
     "//cc/surfaces:surfaces",
     "//components/discardable_memory/client",
+    "//components/metrics",
     "//components/payments/mojom:mojom_payment_app",
     "//components/url_formatter",
     "//components/variations",
     "//content:resources",
     "//content/child",
     "//content/common",
     "//content/common:features",
     "//content/gpu:gpu_sources",
     "//content/public/child:child_sources",
     "//content/public/common:feature_h264_with_openh264_ffmpeg",
@@ skipping 532 matching lines @@
     # For the defines in mojo_media_config.
     public_configs = [ "//media/mojo/services:mojo_media_config" ]
   }
 
   if (!is_component_build) {
     public_deps = [
       ":renderer",
     ]
   }
 }