[Prerender] first contentful paint histograms.

chrome/test/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/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 1610 matching lines @@
       "../browser/net/nqe/ui_network_quality_estimator_service_browsertest.cc",
       "../browser/net/nqe/ui_network_quality_estimator_service_test_util.cc",
       "../browser/net/nqe/ui_network_quality_estimator_service_test_util.h",
       "../browser/net/nss_context_chromeos_browsertest.cc",
       "../browser/net/predictor_browsertest.cc",
       "../browser/net/proxy_browsertest.cc",
       "../browser/net/sdch_browsertest.cc",
       "../browser/net/spdyproxy/chrome_data_use_group_browsertest.cc",
       "../browser/net/websocket_browsertest.cc",
       "../browser/page_load_metrics/observers/https_engagement_metrics/https_engagement_page_load_metrics_observer_browsertest.cc",
+      "../browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.cc",

[pasko, 2016/11/17 19:52:16]

this file is now referenced in 2 places, can it be moved to some common library
instead? like "page_load_metrics_test_support"?

[mattcary, 2016/11/18 09:21:11]

I have no idea, the build file is not very comprehensible.

I could put it into :test_support directly. 

I could make a new page_load_metrics_test_support which I could then include in
browser_tests and unit_tests. Could this new library could reasonably go in
either browser/BUILD.gn or tests/BUILD.gn?

I could put this new page_load_metrics_test_support library either as a
dependence of test_support, or put it as dependencies of unit_tests and
browser_tests.

There are probably some other options as well...

At any rate, point me in the right direction and I'll implement it.

       "../browser/page_load_metrics/page_load_metrics_browsertest.cc",
       "../browser/password_manager/credential_manager_browsertest.cc",
       "../browser/password_manager/password_manager_browsertest.cc",
       "../browser/pdf/pdf_extension_test.cc",
       "../browser/pdf/pdf_extension_test_util.cc",
       "../browser/pdf/pdf_extension_test_util.h",
       "../browser/permissions/permission_request_manager_browsertest.cc",
       "../browser/permissions/permissions_browsertest.cc",
       "../browser/permissions/permissions_browsertest.h",
       "../browser/plugins/flash_permission_browsertest.cc",
@@ skipping 3454 matching lines @@
       "touch_hud",
       "ui",
     ]
 
     if (is_linux && !is_android) {
       deps += [ "//components/font_service:manifest" ]
       packaged_services += [ "font_service" ]
     }
   }
 }