Adds speculative prefetching of resources.

chrome/browser/predictors/resource_prefetch_common.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/predictors/resource_prefetch_common.h"
 
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 
@@ skipping 34 matching lines @@
   DCHECK(is_valid() && rhs.is_valid());
   return IsSameRenderer(rhs) && main_frame_url == rhs.main_frame_url;
 }
 
 bool NavigationID::IsSameRenderer(const NavigationID& other) const {
   DCHECK(is_valid() && other.is_valid());
   return render_process_id == other.render_process_id &&
       render_view_id == other.render_view_id;
 }
 
+ResourcePrefetchPredictorConfig::ResourcePrefetchPredictorConfig()
+    : max_navigation_lifetime_seconds(60),
+      max_urls_to_track(500),
+      min_url_visit_count(3),
+      max_resources_per_entry(50),
+      max_consecutive_misses(3),
+      min_resource_confidence_to_trigger_prefetch(0.8f),
+      min_resource_hits_to_trigger_prefetch(4),
+      max_prefetches_inflight_per_navigation(24),
+      max_prefetches_inflight_per_host_per_navigation(3) {
+}
+
 }  // namespace predictors