[Notification] Make HTML5 Notification use ActionCenter on Windows 10, behind Flags.

chrome/BUILD.gn

Index: chrome/BUILD.gn
diff --git a/chrome/BUILD.gn b/chrome/BUILD.gn
index e29acdc758a6ef4ca9537979b2e65edcd1f48762..9b5e1d0c91ef25aa565aa6a564182da80322134d 100644
--- a/chrome/BUILD.gn
+++ b/chrome/BUILD.gn
@@ -173,6 +173,8 @@ if (!is_android && !is_mac) {
       sources += [
         "app/chrome_exe.rc",
         "app/chrome_exe_load_config_win.cc",
+        "app/chrome_exe_main_app_win.cc",
+        "app/chrome_exe_main_app_win.h",
         "app/chrome_exe_main_win.cc",
         "app/chrome_watcher_client_win.cc",
         "app/chrome_watcher_client_win.h",
@@ -224,6 +226,11 @@ if (!is_android && !is_mac) {
         configs += [ "//build/config/win:windowed" ]
       }
 
+      libs = [
+        "Pathcch.lib",
+        "runtimeobject.lib",
+      ]
+
       ldflags = [
         "/DELAYLOAD:dbghelp.dll",
         "/DELAYLOAD:dwmapi.dll",