Prefetch high-confidence search suggestions in Android Chrome.

chrome/browser/android/tab_android.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/android/tab_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/debug/trace_event.h"
@@ skipping 13 matching lines @@
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
 #include "chrome/browser/sync/glue/synced_tab_delegate_android.h"
 #include "chrome/browser/ui/android/content_settings/popup_blocked_infobar_delegate.h"
 #include "chrome/browser/ui/android/context_menu_helper.h"
 #include "chrome/browser/ui/android/infobars/infobar_container_android.h"
 #include "chrome/browser/ui/android/tab_model/tab_model.h"
 #include "chrome/browser/ui/android/tab_model/tab_model_list.h"
 #include "chrome/browser/ui/android/window_android_helper.h"
 #include "chrome/browser/ui/blocked_content/popup_blocker_tab_helper.h"
+#include "chrome/browser/ui/search/instant_search_prerenderer.h"
 #include "chrome/browser/ui/search/search_tab_helper.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper.h"
 #include "chrome/browser/ui/tab_helpers.h"
 #include "chrome/browser/ui/toolbar/toolbar_model_impl.h"
 #include "chrome/common/url_constants.h"
 #include "components/google/core/browser/google_url_tracker.h"
 #include "components/infobars/core/infobar_container.h"
 #include "components/url_fixer/url_fixer.h"
 #include "content/public/browser/android/content_view_core.h"
 #include "content/public/browser/navigation_entry.h"
@@ skipping 344 matching lines @@
 
   // If the page was prerendered, use it.
   // Note in incognito mode, we don't have a PrerenderManager.
 
   prerender::PrerenderManager* prerender_manager =
       prerender::PrerenderManagerFactory::GetForProfile(GetProfile());
   if (prerender_manager) {
     bool prefetched_page_loaded = HasPrerenderedUrl(gurl);
     // Getting the load status before MaybeUsePrerenderedPage() b/c it resets.
     chrome::NavigateParams params(NULL, web_contents());
+    InstantSearchPrerenderer* prerenderer =
+        InstantSearchPrerenderer::GetForProfile(GetProfile());
+    if (prerenderer) {
+      const base::string16& search_terms =
+          chrome::ExtractSearchTermsFromURL(GetProfile(), gurl);
+      if (!search_terms.empty() &&
+          prerenderer->CanCommitQuery(web_contents_.get(), search_terms)) {
+        prerenderer->Commit(search_terms);
+
+        if (prerenderer->UsePrerenderedPage(gurl, &params))
+          return FULL_PRERENDERED_PAGE_LOAD;
+      }
+      prerenderer->Cancel();
+    }
     if (prerender_manager->MaybeUsePrerenderedPage(gurl, &params)) {
       return prefetched_page_loaded ?
           FULL_PRERENDERED_PAGE_LOAD : PARTIAL_PRERENDERED_PAGE_LOAD;
     }
   }
 
   GURL fixed_url(
       url_fixer::FixupURL(gurl.possibly_invalid_spec(), std::string()));
   if (!fixed_url.is_valid())
     return PAGE_LOAD_FAILED;
@@ skipping 103 matching lines @@
 
 static void Init(JNIEnv* env, jobject obj) {
   TRACE_EVENT0("native", "TabAndroid::Init");
   // This will automatically bind to the Java object and pass ownership there.
   new TabAndroid(env, obj);
 }
 
 bool TabAndroid::RegisterTabAndroid(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }