Implement WebPrescientNetworking to trigger preconnect from Blink

net/http/http_request_info.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_HTTP_HTTP_REQUEST_INFO_H__
 #define NET_HTTP_HTTP_REQUEST_INFO_H__
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/net_export.h"
 #include "net/http/http_request_headers.h"
 
 namespace net {
 
 class UploadDataStream;
 
 struct NET_EXPORT HttpRequestInfo {
   enum RequestMotivation{
     // TODO(mbelshe): move these into Client Socket.
     PRECONNECT_MOTIVATED,  // Request was motivated by a prefetch.
     OMNIBOX_MOTIVATED,     // Request was motivated by the omnibox.
     NORMAL_MOTIVATION,     // No special motivation associated with the request.
     EARLY_LOAD_MOTIVATED,  // When browser asks a tab to open an URL, this short
                            // circuits that path (of waiting for the renderer to
                            // do the URL request), and starts loading ASAP.
+    MOUSE_OVER_MOTIVATED,  // Request was motivated by a preconnect
+                           // from link mouseover
+    MOUSE_DOWN_MOTIVATED,  // Request was motivated by a preconnect
+                           // from link mousedown
+    TAP_UNCONFIRMED_MOTIVATED, // Request was motivated by a preconnect
+                           // from link unconfirmed tap
+    TAP_DOWN_MOTIVATED,    // Request was motivated by a preconnect
+                           // from link tapdown
   };
 
   HttpRequestInfo();
   ~HttpRequestInfo();
 
   // The requested URL.
   GURL url;
 
   // The method to use (GET, POST, etc.).
   std::string method;
@@ skipping 11 matching lines @@
   RequestMotivation motivation;
 
   // An optional globally unique identifier for this request for use by the
   // consumer. 0 is invalid.
   uint64 request_id;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_REQUEST_INFO_H__