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 1700 matching lines @@
         "views/frame/browser_command_handler_linux.cc",
         "views/frame/browser_command_handler_linux.h",
         "views/frame/browser_frame.cc",
         "views/frame/browser_frame.h",
         "views/frame/browser_non_client_frame_view.cc",
         "views/frame/browser_non_client_frame_view.h",
         "views/frame/browser_root_view.cc",
         "views/frame/browser_root_view.h",
         "views/frame/browser_view.cc",
         "views/frame/browser_view.h",
+        "views/frame/browser_view_histogram_helper.cc",
+        "views/frame/browser_view_histogram_helper.h",
         "views/frame/browser_view_layout.cc",
         "views/frame/browser_view_layout.h",
         "views/frame/browser_view_layout_delegate.h",
         "views/frame/browser_window_factory.cc",
         "views/frame/browser_window_property_manager_win.cc",
         "views/frame/browser_window_property_manager_win.h",
         "views/frame/contents_layout_manager.cc",
         "views/frame/contents_layout_manager.h",
         "views/frame/contents_web_view.cc",
         "views/frame/contents_web_view.h",
@@ skipping 1800 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" ]
   }
 }