Revert of Convert network hints to Mojo

chromecast/browser/cast_content_browser_client.h

Index: chromecast/browser/cast_content_browser_client.h
diff --git a/chromecast/browser/cast_content_browser_client.h b/chromecast/browser/cast_content_browser_client.h
index 9cc6a37b70226806128a07526365046c9b206df9..dffac910b9fccc343fb8402519a2628d41b2972f 100644
--- a/chromecast/browser/cast_content_browser_client.h
+++ b/chromecast/browser/cast_content_browser_client.h
@@ -26,10 +26,6 @@
 
 namespace metrics {
 class MetricsService;
-}
-
-namespace network_hints {
-class NetworkHintsImpl;
 }
 
 namespace chromecast {
@@ -174,8 +170,8 @@
   }
 
  private:
-  void AddNetworkHintsImpl(int render_process_id,
-                           net::URLRequestContext* context);
+  void AddNetworkHintsMessageFilter(int render_process_id,
+                                    net::URLRequestContext* context);
 
   net::X509Certificate* SelectClientCertificateOnIOThread(
       GURL requesting_url,
@@ -197,8 +193,6 @@
   CastBrowserMainParts* cast_browser_main_parts_;
   std::unique_ptr<URLRequestContextFactory> url_request_context_factory_;
 
-  std::unique_ptr<network_hints::NetworkHintsImpl> network_hints_;
-
   DISALLOW_COPY_AND_ASSIGN(CastContentBrowserClient);
 };