Added prerendering to omnibox.

chrome/browser/instant/instant_controller.cc

 // 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.
 
 #include "chrome/browser/instant/instant_controller.h"
 
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "build/build_config.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
 #include "chrome/browser/instant/instant_delegate.h"
 #include "chrome/browser/instant/instant_loader.h"
 #include "chrome/browser/instant/instant_loader_manager.h"
 #include "chrome/browser/instant/promo_counter.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/browser/search_engines/template_url_service.h"
 #include "chrome/browser/search_engines/template_url_service_factory.h"
 #include "chrome/browser/ui/blocked_content/blocked_content_tab_helper.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "content/browser/renderer_host/render_widget_host_view.h"
@@ skipping 644 matching lines @@
       // To avoid extra load on other search engines we only enable previews if
       // they support the instant API.
       return false;
     }
   }
   *template_url = t_url;
 
   if (match.destination_url.SchemeIs(chrome::kJavaScriptScheme))
     return false;
 
-  // Extension keywords don't have a real destionation URL.
+  // Extension keywords don't have a real destination URL.
   if (match.template_url && match.template_url->IsExtensionKeyword())
     return false;
 
   // Was the host blacklisted?
   if (host_blacklist_ && host_blacklist_->count(match.destination_url.host()))
     return false;
 
   const CommandLine* cl = CommandLine::ForCurrentProcess();
   if (cl->HasSwitch(switches::kRestrictInstantToSearch) &&
       match.type != AutocompleteMatch::SEARCH_WHAT_YOU_TYPED &&
       match.type != AutocompleteMatch::SEARCH_HISTORY &&
       match.type != AutocompleteMatch::SEARCH_SUGGEST &&
       match.type != AutocompleteMatch::SEARCH_OTHER_ENGINE) {
+    // Start Prerender of this page instead.
+    CommandLine* cl = CommandLine::ForCurrentProcess();

[sky, 2011/06/20 19:29:24]

I don't like that this method has a side effect. Can you instead make it return
an enum indicating why it shouldn't show the preview and key off that.

[dominich, 2011/06/20 20:48:40]

Done.

+    if (cl->HasSwitch(switches::kPrerenderFromOmnibox)) {
+      prerender::PrerenderManager* prerender_manager =
+          tab_contents_->profile()->GetPrerenderManager();
+      if (prerender_manager)
+        prerender_manager->AddPrerenderWithNoTag(match.destination_url);
+    }
     return false;
   }
 
   return true;
 }
 
 void InstantController::BlacklistFromInstant(TemplateURLID id) {
   blacklisted_ids_.insert(id);
 }
 
@@ skipping 23 matching lines @@
   const TemplateURL* template_url = match.template_url;
   if (match.type == AutocompleteMatch::SEARCH_WHAT_YOU_TYPED ||
       match.type == AutocompleteMatch::SEARCH_HISTORY ||
       match.type == AutocompleteMatch::SEARCH_SUGGEST) {
     TemplateURLService* model = TemplateURLServiceFactory::GetForProfile(
         tab_contents_->profile());
     template_url = model ? model->GetDefaultSearchProvider() : NULL;
   }
   return template_url;
 }