Seculative resource prefetching for URLs CL.

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.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_resource_dispatcher_host_delegate.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/logging.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/download/download_request_limiter.h"
 #include "chrome/browser/download/download_resource_throttle.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/extensions/user_script_listener.h"
 #include "chrome/browser/external_protocol/external_protocol_handler.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/browser/instant/instant_loader.h"
 #include "chrome/browser/net/load_timing_observer.h"
+#include "chrome/browser/net/resource_prefetch_predictor_observer.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_tracker.h"
 #include "chrome/browser/profiles/profile_io_data.h"
 #include "chrome/browser/renderer_host/chrome_url_request_user_data.h"
 #include "chrome/browser/renderer_host/safe_browsing_resource_throttle.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "chrome/browser/ui/auto_login_prompter.h"
 #include "chrome/browser/ui/login/login_prompt.h"
 #include "chrome/browser/ui/sync/one_click_signin_helper.h"
 #include "chrome/common/chrome_notification_types.h"
@@ skipping 111 matching lines @@
 #endif
 
   AppendChromeMetricsHeaders(request, resource_context, resource_type);
 
   AppendStandardResourceThrottles(request,
                                   resource_context,
                                   child_id,
                                   route_id,
                                   resource_type,
                                   throttles);
+
+  ProfileIOData* io_data = ProfileIOData::FromResourceContext(resource_context);
+  if (io_data->resource_prefetch_predictor_observer())
+    io_data->resource_prefetch_predictor_observer()->OnRequestStarted(
+        request, resource_type, child_id, route_id);
 }
 
 void ChromeResourceDispatcherHostDelegate::DownloadStarting(
     net::URLRequest* request,
     content::ResourceContext* resource_context,
     int child_id,
     int route_id,
     int request_id,
     bool is_content_initiated,
     ScopedVector<content::ResourceThrottle>* throttles) {
@@ skipping 145 matching lines @@
 }
 
 bool ChromeResourceDispatcherHostDelegate::ShouldForceDownloadResource(
     const GURL& url, const std::string& mime_type) {
   // Special-case user scripts to get downloaded instead of viewed.
   return UserScript::IsURLUserScript(url, mime_type);
 }
 
 void ChromeResourceDispatcherHostDelegate::OnResponseStarted(
     net::URLRequest* request,
+    content::ResourceContext* resource_context,
     content::ResourceResponse* response,
     IPC::Message::Sender* sender) {
   LoadTimingObserver::PopulateTimingInfo(request, response);
 
   const ResourceRequestInfo* info = ResourceRequestInfo::ForRequest(request);
 
   if (request->url().SchemeIsSecure()) {
     const net::URLRequestContext* context = request->context();
     net::TransportSecurityState* state = context->transport_security_state();
     if (state) {
       net::TransportSecurityState::DomainState domain_state;
       bool has_sni = net::SSLConfigService::IsSNIAvailable(
           context->ssl_config_service());
       if (state->GetDomainState(
               request->url().host(), has_sni, &domain_state)) {
         sender->Send(new ChromeViewMsg_AddStrictSecurityHost(
             info->GetRouteID(), request->url().host()));
       }
     }
   }
 
   // See if the response contains the X-Auto-Login header.  If so, this was
   // a request for a login page, and the server is allowing the browser to
   // suggest auto-login, if available.
   AutoLoginPrompter::ShowInfoBarIfPossible(request, info->GetChildID(),
                                            info->GetRouteID());
+
+  ProfileIOData* io_data = ProfileIOData::FromResourceContext(resource_context);
+  if (io_data->resource_prefetch_predictor_observer())
+    io_data->resource_prefetch_predictor_observer()->OnResponseStarted(request);
 }
 
 void ChromeResourceDispatcherHostDelegate::OnRequestRedirected(
     net::URLRequest* request,
+    content::ResourceContext* resource_context,
     content::ResourceResponse* response) {
   LoadTimingObserver::PopulateTimingInfo(request, response);
 
 #if defined(ENABLE_ONE_CLICK_SIGNIN)
   const ResourceRequestInfo* info = ResourceRequestInfo::ForRequest(request);
 
   // See if the response contains the Google-Accounts-SignIn header.  If so,
   // then the user has just finished signing in, and the server is allowing the
   // browser to suggest connecting the user's profile to the account.
   OneClickSigninHelper::ShowInfoBarIfPossible(request, info->GetChildID(),
                                               info->GetRouteID());
 #endif
+
+  ProfileIOData* io_data = ProfileIOData::FromResourceContext(resource_context);
+  if (io_data->resource_prefetch_predictor_observer())
+    io_data->resource_prefetch_predictor_observer()->OnRequestRedirected(
+        request);
 }
 
 void ChromeResourceDispatcherHostDelegate::OnFieldTrialGroupFinalized(
     const std::string& trial_name,
     const std::string& group_name) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   chrome_variations::ID new_id =
       experiments_helper::GetGoogleVariationID(trial_name, group_name);
   if (new_id == chrome_variations::kEmptyID)
     return;
@@ skipping 41 matching lines @@
   if (base::Base64Encode(serialized, &hashed)) {
     // If successful, swap the header value with the new one.
     // Note that the list of IDs and the header could be temporarily out of sync
     // if IDs are added as we are recreating the header, but we're OK with those
     // descrepancies.
     variation_ids_header_ = hashed;
   } else {
     DVLOG(1) << "Failed to base64 encode Variation IDs value: " << serialized;
   }
 }