Implement WebPrescientNetworking to trigger preconnect from Blink

chrome/browser/renderer_host/chrome_render_view_host_observer.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/renderer_host/chrome_render_view_host_observer.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/net/predictor.h"
@@ skipping 14 matching lines @@
 
 #if defined(OS_WIN)
 #include "base/win/win_util.h"
 #endif  // OS_WIN
 
 using content::ChildProcessSecurityPolicy;
 using content::RenderViewHost;
 using content::SiteInstance;
 using extensions::Extension;
 using extensions::Manifest;
+using chrome_browser_net::UrlInfo;
 
 ChromeRenderViewHostObserver::ChromeRenderViewHostObserver(
     RenderViewHost* render_view_host, chrome_browser_net::Predictor* predictor)
     : content::RenderViewHostObserver(render_view_host),
       predictor_(predictor) {
   SiteInstance* site_instance = render_view_host->GetSiteInstance();
   profile_ = Profile::FromBrowserContext(
       site_instance->GetBrowserContext());
 
   InitRenderViewForExtensions();
@@ skipping 14 matching lines @@
     RenderViewHost* rvh) {
   RemoveRenderViewHostForExtensions(rvh);
   delete this;
 }
 
 void ChromeRenderViewHostObserver::Navigate(const GURL& url) {
   if (!predictor_)
     return;
   if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kChromeFrame) &&
      (url.SchemeIs(chrome::kHttpScheme) || url.SchemeIs(chrome::kHttpsScheme)))
-    predictor_->PreconnectUrlAndSubresources(url);
+    predictor_->PreconnectUrlAndSubresources(
+        url, UrlInfo::EARLY_LOAD_MOTIVATED, 0);
 }
 
 bool ChromeRenderViewHostObserver::OnMessageReceived(
     const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ChromeRenderViewHostObserver, message)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_FocusedNodeTouched,
                         OnFocusedNodeTouched)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
@@ skipping 95 matching lines @@
     content::NotificationService::current()->Notify(
         chrome::NOTIFICATION_FOCUSED_NODE_TOUCHED,
         content::Source<RenderViewHost>(render_view_host()),
         content::Details<bool>(&editable));
   } else {
 #if defined(OS_WIN)
     base::win::DismissVirtualKeyboard();
 #endif
   }
 }