Remove the speculative resource prefetching code. This was experimental code added 1.5 years ago an…

chrome/browser/ui/webui/predictors/predictors_handler.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/ui/webui/predictors/predictors_handler.h"
 
 #include "base/bind.h"
 #include "base/values.h"
 #include "chrome/browser/predictors/autocomplete_action_predictor.h"
 #include "chrome/browser/predictors/autocomplete_action_predictor_factory.h"
-#include "chrome/browser/predictors/resource_prefetch_predictor.h"
-#include "chrome/browser/predictors/resource_prefetch_predictor_factory.h"
-#include "chrome/browser/predictors/resource_prefetch_predictor_tables.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/web_ui.h"
-#include "webkit/common/resource_type.h"
 
 using predictors::AutocompleteActionPredictor;
-using predictors::ResourcePrefetchPredictor;
-using predictors::ResourcePrefetchPredictorTables;
-
-namespace {
-
-std::string ConvertResourceType(ResourceType::Type type) {
-  switch (type) {
-    case ResourceType::IMAGE:
-      return "Image";
-    case ResourceType::STYLESHEET:
-      return "Stylesheet";
-    case ResourceType::SCRIPT:
-      return "Script";
-    default:
-      return "Unknown";
-  }
-}
-
-}  // namespace
 
 PredictorsHandler::PredictorsHandler(Profile* profile) {
   autocomplete_action_predictor_ =
       predictors::AutocompleteActionPredictorFactory::GetForProfile(profile);
-  resource_prefetch_predictor_ =
-      predictors::ResourcePrefetchPredictorFactory::GetForProfile(profile);
 }
 
 PredictorsHandler::~PredictorsHandler() { }
 
 void PredictorsHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback("requestAutocompleteActionPredictorDb",
       base::Bind(&PredictorsHandler::RequestAutocompleteActionPredictorDb,
                  base::Unretained(this)));
-  web_ui()->RegisterMessageCallback("requestResourcePrefetchPredictorDb",
-      base::Bind(&PredictorsHandler::RequestResourcePrefetchPredictorDb,
-                 base::Unretained(this)));
 }
 
 void PredictorsHandler::RequestAutocompleteActionPredictorDb(
     const base::ListValue* args) {
   const bool enabled = (autocomplete_action_predictor_ != NULL);
   base::DictionaryValue dict;
   dict.SetBoolean("enabled", enabled);
   if (enabled) {
     base::ListValue* db = new base::ListValue();
     for (AutocompleteActionPredictor::DBCacheMap::const_iterator it =
              autocomplete_action_predictor_->db_cache_.begin();
          it != autocomplete_action_predictor_->db_cache_.end();
          ++it) {
       base::DictionaryValue* entry = new base::DictionaryValue();
       entry->SetString("user_text", it->first.user_text);
       entry->SetString("url", it->first.url.spec());
       entry->SetInteger("hit_count", it->second.number_of_hits);
       entry->SetInteger("miss_count", it->second.number_of_misses);
       entry->SetDouble("confidence",
           autocomplete_action_predictor_->CalculateConfidenceForDbEntry(it));
       db->Append(entry);
     }
     dict.Set("db", db);
   }
 
   web_ui()->CallJavascriptFunction("updateAutocompleteActionPredictorDb", dict);
 }
-
-void PredictorsHandler::RequestResourcePrefetchPredictorDb(
-    const base::ListValue* args) {
-  const bool enabled = (resource_prefetch_predictor_ != NULL);
-  base::DictionaryValue dict;
-  dict.SetBoolean("enabled", enabled);
-
-  if (enabled) {
-    // Url Database cache.
-    base::ListValue* db = new base::ListValue();
-    AddPrefetchDataMapToListValue(
-        *resource_prefetch_predictor_->url_table_cache_, db);
-    dict.Set("url_db", db);
-
-    db = new base::ListValue();
-    AddPrefetchDataMapToListValue(
-        *resource_prefetch_predictor_->host_table_cache_, db);
-    dict.Set("host_db", db);
-  }
-
-  web_ui()->CallJavascriptFunction("updateResourcePrefetchPredictorDb", dict);
-}
-
-void PredictorsHandler::AddPrefetchDataMapToListValue(
-    const ResourcePrefetchPredictor::PrefetchDataMap& data_map,
-    base::ListValue* db) const {
-  for (ResourcePrefetchPredictor::PrefetchDataMap::const_iterator it =
-       data_map.begin(); it != data_map.end(); ++it) {
-    base::DictionaryValue* main = new base::DictionaryValue();
-    main->SetString("main_frame_url", it->first);
-    base::ListValue* resources = new base::ListValue();
-    for (ResourcePrefetchPredictor::ResourceRows::const_iterator
-         row = it->second.resources.begin();
-         row != it->second.resources.end(); ++row) {
-      base::DictionaryValue* resource = new base::DictionaryValue();
-      resource->SetString("resource_url", row->resource_url.spec());
-      resource->SetString("resource_type",
-                          ConvertResourceType(row->resource_type));
-      resource->SetInteger("number_of_hits", row->number_of_hits);
-      resource->SetInteger("number_of_misses", row->number_of_misses);
-      resource->SetInteger("consecutive_misses", row->consecutive_misses);
-      resource->SetDouble("position", row->average_position);
-      resource->SetDouble("score", row->score);
-      resources->Append(resource);
-    }
-    main->Set("resources", resources);
-    db->Append(main);
-  }
-}