Add Startup.BrowserView.FirstPaint / .CompositingEnded histograms.

chrome/browser/ui/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/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 638 matching lines @@
 
   if (is_android || is_linux) {
     sources += [
       "webui/sandbox_internals_ui.cc",
       "webui/sandbox_internals_ui.h",
     ]
   }
 
   if (!is_android) {
     sources += [
+      "../metrics/browser_view_histogram_helper.cc",
+      "../metrics/browser_view_histogram_helper.h",
       "apps/app_info_dialog.h",
       "apps/chrome_app_delegate.cc",
       "apps/chrome_app_delegate.h",
       "apps/chrome_app_window_client.cc",
       "apps/chrome_app_window_client.h",
       "apps/directory_access_confirmation_dialog.cc",
       "apps/directory_access_confirmation_dialog.h",
       "blocked_content/app_modal_dialog_helper.cc",
       "blocked_content/app_modal_dialog_helper.h",
       "bluetooth/bluetooth_chooser_controller.cc",
@@ skipping 2913 matching lines @@
       "test/test_confirm_bubble_model.cc",
       "test/test_confirm_bubble_model.h",
     ]
     deps += [ "//chrome/test:test_support_ui" ]
   }
 
   if (enable_extensions) {
     deps += [ "//extensions/browser" ]
   }
 }