Removed partial Client Hints implementation from the Chrome side.

chrome/browser/net/chrome_network_delegate.h

Index: chrome/browser/net/chrome_network_delegate.h
diff --git a/chrome/browser/net/chrome_network_delegate.h b/chrome/browser/net/chrome_network_delegate.h
index 4635e57422fbc183b935b81887dafb9e515e2fed..0d7053950d59215498d0ca6b1e194ca8b47d9598 100644
--- a/chrome/browser/net/chrome_network_delegate.h
+++ b/chrome/browser/net/chrome_network_delegate.h
@@ -17,7 +17,6 @@
 #include "net/base/network_delegate_impl.h"
 
 class ChromeExtensionsNetworkDelegate;
-class ClientHints;
 class CookieSettings;
 class PrefService;
 
@@ -125,9 +124,6 @@ class ChromeNetworkDelegate : public net::NetworkDelegateImpl {
     prerender_tracker_ = prerender_tracker;
   }
 
-  // Adds the Client Hints header to HTTP requests.
-  void SetEnableClientHints();
-
   // Causes |OnCanThrottleRequest| to always return false, for all
   // instances of this object.
   static void NeverThrottleRequests();
@@ -229,8 +225,6 @@ class ChromeNetworkDelegate : public net::NetworkDelegateImpl {
   // static anyway since it is based on a command-line flag.
   static bool g_never_throttle_requests_;
 
-  scoped_ptr<ClientHints> client_hints_;
-
   bool first_request_;
 
   prerender::PrerenderTracker* prerender_tracker_;