Updated Client-Hints patch

chrome/browser/net/chrome_network_delegate.cc

Index: chrome/browser/net/chrome_network_delegate.cc
diff --git a/chrome/browser/net/chrome_network_delegate.cc b/chrome/browser/net/chrome_network_delegate.cc
index e02dca60f1ef848d035d1a6d7053f86ba7388893..9fc5f8f16459eba356ee5bf04f7790616506e5fe 100644
--- a/chrome/browser/net/chrome_network_delegate.cc
+++ b/chrome/browser/net/chrome_network_delegate.cc
@@ -28,6 +28,7 @@
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/google/google_util.h"
+#include "chrome/browser/net/client_hints.h"
 #include "chrome/browser/net/connect_interceptor.h"
 #include "chrome/browser/net/load_time_stats.h"
 #include "chrome/browser/performance_monitor/performance_monitor.h"
@@ -79,6 +80,7 @@ bool ChromeNetworkDelegate::g_never_throttle_requests_ = false;
 namespace {
 
 const char kDNTHeader[] = "DNT";
+const char kClientHintsHeader[] = "CH";
 
 // If the |request| failed due to problems with a proxy, forward the error to
 // the proxy extension API.
@@ -530,6 +532,11 @@ void ChromeNetworkDelegate::set_predictor(
       new chrome_browser_net::ConnectInterceptor(predictor));
 }
 
+void ChromeNetworkDelegate::SetEnableClientHints() {
+  client_hints_.reset(new ClientHints());
+  client_hints_->Init();
+}
+
 // static
 void ChromeNetworkDelegate::NeverThrottleRequests() {
   g_never_throttle_requests_ = true;
@@ -614,6 +621,11 @@ int ChromeNetworkDelegate::OnBeforeURLRequest(
   if (enable_do_not_track_ && enable_do_not_track_->GetValue())
     request->SetExtraRequestHeaderByName(kDNTHeader, "1", true /* override */);
 
+  if (client_hints_) {
+    request->SetExtraRequestHeaderByName(kClientHintsHeader,
+                                         client_hints_->GetString(), true);
+  }
+
   bool force_safe_search = force_google_safe_search_ &&
                            force_google_safe_search_->GetValue();