Revert of Convert network hints to Mojo

components/network_hints/renderer/renderer_dns_prefetch.h

Index: components/network_hints/renderer/renderer_dns_prefetch.h
diff --git a/components/network_hints/renderer/renderer_dns_prefetch.h b/components/network_hints/renderer/renderer_dns_prefetch.h
index 307a82c28c496f3dc8cdf3108277ee4ba62b22d4..9df9e5b9e00bdca1e54cac5b72fb531d2c34d2d1 100644
--- a/components/network_hints/renderer/renderer_dns_prefetch.h
+++ b/components/network_hints/renderer/renderer_dns_prefetch.h
@@ -28,12 +28,9 @@
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
-#include "components/network_hints/public/interfaces/network_hints.mojom.h"
 #include "components/network_hints/renderer/dns_prefetch_queue.h"
 
 namespace network_hints {
-
-class NetworkHints;
 
 // An internal interface to the network_hints component for efficiently sending
 // DNS prefetch requests to the net stack.
@@ -80,9 +77,6 @@
   // This discards ALL queue entries, and map entries.
   void Reset();
 
-  // Get a connected NetworkHints.
-  mojom::NetworkHints& GetNetworkHints();
-
   // We use c_string_queue_ to hold lists of names supplied typically) by the
   // renderer.  It queues the names, at minimal cost to the renderer's thread,
   // and allows this class to process them when time permits (in a later task).
@@ -107,9 +101,6 @@
   int buffer_full_discard_count_;
   int numeric_ip_discard_count_;
 
-  // Don't use directly. Instead call |GetNetworkHints()|.
-  mojom::NetworkHintsPtr network_hints_;
-
   base::WeakPtrFactory<RendererDnsPrefetch> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererDnsPrefetch);