First-Party Cookies: Wire it up as an experimental web platform feature

chrome/browser/profiles/profile_io_data.cc

Index: chrome/browser/profiles/profile_io_data.cc
diff --git a/chrome/browser/profiles/profile_io_data.cc b/chrome/browser/profiles/profile_io_data.cc
index eb7280c64580bf3ee2e112b60c6a92cf53e6253c..5d2e7e1d5954f000e893a12fe22fa156550657de 100644
--- a/chrome/browser/profiles/profile_io_data.cc
+++ b/chrome/browser/profiles/profile_io_data.cc
@@ -1046,6 +1046,8 @@ void ProfileIOData::Init(
           &enable_referrers_));
   if (command_line.HasSwitch(switches::kEnableClientHints))
     network_delegate->SetEnableClientHints();
+  if (command_line.HasSwitch(switches::kEnableExperimentalWebPlatformFeatures))
+    network_delegate->SetExperimentalWebPlatformFeaturesEnabled();
 #if defined(ENABLE_EXTENSIONS)
   network_delegate->set_extension_info_map(
       profile_params_->extension_info_map.get());