Implement WebPrescientNetworking to trigger preconnect from Blink

chrome/renderer/chrome_content_renderer_client.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/renderer/chrome_content_renderer_client.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 1004 matching lines @@
 
 bool ChromeContentRendererClient::IsLinkVisited(unsigned long long link_hash) {
   return visited_link_slave_->IsVisited(link_hash);
 }
 
 void ChromeContentRendererClient::PrefetchHostName(const char* hostname,
                                                    size_t length) {
   net_predictor_->Resolve(hostname, length);
 }
 
+void ChromeContentRendererClient::Preconnect(
+    const GURL& url,
+    WebKit::WebPreconnectMotivation motivation,
+    uint32_t motivationVariationId) {
+  RenderThread::Get()->Send(new ChromeViewHostMsg_Preconnect(
+      url, motivation, motivationVariationId));
+}
+
 bool ChromeContentRendererClient::ShouldOverridePageVisibilityState(
     const content::RenderView* render_view,
     WebKit::WebPageVisibilityState* override_state) const {
   if (!prerender::PrerenderHelper::IsPrerendering(render_view))
     return false;
 
   *override_state = WebKit::WebPageVisibilityStatePrerender;
   return true;
 }
 
@@ skipping 139 matching lines @@
 
   if (container->element().shadowHost().isNull())
     return false;
 
   WebString tag_name = container->element().shadowHost().tagName();
   return tag_name.equals(WebString::fromUTF8(kWebViewTagName)) ||
     tag_name.equals(WebString::fromUTF8(kAdViewTagName));
 }
 
 }  // namespace chrome