Export stability metrics to UMA from Blimp engine

blimp/engine/BUILD.gn

 # Copyright 2015 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/features.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/ui.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//tools/grit/repack.gni")
@@ skipping 88 matching lines @@
     "//content/public/common",
     "//ui/gl",
     "//ui/native_theme",
   ]
 }
 
 source_set("app_metrics") {
   sources = [
     "app/blimp_metrics_service_client.cc",
     "app/blimp_metrics_service_client.h",
+    "app/blimp_stability_metrics_provider.cc",
+    "app/blimp_stability_metrics_provider.h",
   ]
 
   public_deps = [
     "//components/metrics",
     "//content/public/browser",
   ]
 
   deps = [
     "//base",
     "//base:i18n",
@@ skipping 246 matching lines @@
     "//base",
   ]
 }
 
 source_set("app_unit_tests") {
   testonly = true
 
   sources = [
     "app/blimp_engine_config_unittest.cc",
     "app/blimp_metrics_service_client_unittest.cc",
+    "app/blimp_stability_metrics_provider_unittest.cc",
     "app/blimp_system_url_request_context_getter_unittest.cc",
     "app/settings_manager_unittest.cc",
     "app/ui/blimp_screen_unittest.cc",
   ]
 
   deps = [
     ":app",
     ":app_config",
     ":app_metrics",
     ":app_net",
     ":app_settings",
     "//base",
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//blimp/common",
     "//blimp/common:test_support",
     "//blimp/engine:app_ui",
     "//components/metrics:metrics",
     "//components/pref_registry:pref_registry",
     "//components/prefs:prefs",
+    "//components/prefs:test_support",
     "//content/test:test_support",
     "//net:test_support",
     "//testing/gmock",
     "//testing/gtest",
     "//ui/display",
     "//ui/gfx:test_support",
   ]
 }
 
 source_set("common_unit_tests") {
@@ skipping 195 matching lines @@
       # Include symupload target here as it is needed by the buildbots to upload
       # the symbol file created by dump_syms.
       deps = [
         ":blimp_engine_app",
         "//breakpad:symupload",
         dump_syms_label,
       ]
     }
   }
 }