Revert of Small: Start checking URLs using PVer4. Verdict not returned to client yet.

chrome/browser/loader/safe_browsing_resource_throttle.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/loader/safe_browsing_resource_throttle.h"
 
 #include <iterator>
 #include <utility>
 
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/trace_event/trace_event.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prerender/prerender_contents.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "components/safe_browsing_db/util.h"
-#include "components/safe_browsing_db/v4_feature_list.h"
-#include "components/safe_browsing_db/v4_local_database_manager.h"
 #include "components/subresource_filter/content/browser/content_subresource_filter_driver_factory.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/resource_controller.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/browser/web_contents.h"
 #include "net/base/load_flags.h"
 #include "net/log/net_log.h"
 #include "net/log/net_log_source_type.h"
 #include "net/url_request/redirect_info.h"
@@ skipping 61 matching lines @@
     safe_browsing::SafeBrowsingService* sb_service)
     : state_(STATE_NONE),
       defer_state_(DEFERRED_NONE),
       threat_type_(safe_browsing::SB_THREAT_TYPE_SAFE),
       database_manager_(sb_service->database_manager()),
       ui_manager_(sb_service->ui_manager()),
       request_(request),
       resource_type_(resource_type),
       net_log_with_source_(
           net::NetLogWithSource::Make(request->net_log().net_log(),
-                                      NetLogSourceType::SAFE_BROWSING)),
-      v4_local_database_manager_(sb_service->v4_local_database_manager()) {}
+                                      NetLogSourceType::SAFE_BROWSING)) {}
 
 SafeBrowsingResourceThrottle::~SafeBrowsingResourceThrottle() {
   if (defer_state_ != DEFERRED_NONE) {
     EndNetLogEvent(NetLogEventType::SAFE_BROWSING_DEFERRED, nullptr, nullptr);
   }
 
   if (state_ == STATE_CHECKING_URL) {
     database_manager_->CancelCheck(this);
-    if (safe_browsing::V4FeatureList::IsParallelCheckEnabled()) {
-      v4_local_database_manager_->CancelCheck(this);
-    }
-
     EndNetLogEvent(NetLogEventType::SAFE_BROWSING_CHECKING_URL, "result",
                    "request_canceled");
   }
 }
 
 // Note on net_log calls: SAFE_BROWSING_DEFERRED events must be wholly
 // nested within SAFE_BROWSING_CHECKING_URL events.  Synchronous checks
 // are not logged at all.
 void SafeBrowsingResourceThrottle::BeginNetLogEvent(NetLogEventType type,
                                                     const GURL& url,
@@ skipping 248 matching lines @@
   if (!database_manager_->CanCheckResourceType(resource_type_)) {
     UMA_HISTOGRAM_ENUMERATION("SB2.ResourceTypes2.Skipped", resource_type_,
                               content::RESOURCE_TYPE_LAST_TYPE);
     return true;
   }
 
   bool succeeded_synchronously = database_manager_->CheckBrowseUrl(url, this);
   UMA_HISTOGRAM_ENUMERATION("SB2.ResourceTypes2.Checked", resource_type_,
                             content::RESOURCE_TYPE_LAST_TYPE);
 
-  if (safe_browsing::V4FeatureList::IsParallelCheckEnabled() &&
-      v4_local_database_manager_->CanCheckResourceType(resource_type_)) {
-    v4_local_database_manager_->CheckBrowseUrl(url, this);
-  }
-
   if (succeeded_synchronously) {
     threat_type_ = safe_browsing::SB_THREAT_TYPE_SAFE;
     ui_manager_->LogPauseDelay(base::TimeDelta());  // No delay.
     return true;
   }
 
   state_ = STATE_CHECKING_URL;
   url_being_checked_ = url;
   BeginNetLogEvent(NetLogEventType::SAFE_BROWSING_CHECKING_URL, url, nullptr,
                    nullptr);
 
   // Start a timer to abort the check if it takes too long.
   // TODO(nparker): Set this only when we defer, based on remaining time,
   // so we don't cancel earlier than necessary.
   timer_.Start(FROM_HERE,
                base::TimeDelta::FromMilliseconds(kCheckUrlTimeoutMs),
                this, &SafeBrowsingResourceThrottle::OnCheckUrlTimeout);
 
   return false;
 }
 
 void SafeBrowsingResourceThrottle::OnCheckUrlTimeout() {
   CHECK_EQ(state_, STATE_CHECKING_URL);
 
   database_manager_->CancelCheck(this);
-  if (safe_browsing::V4FeatureList::IsParallelCheckEnabled()) {
-    v4_local_database_manager_->CancelCheck(this);
-  }
   OnCheckBrowseUrlResult(url_being_checked_, safe_browsing::SB_THREAT_TYPE_SAFE,
                          safe_browsing::ThreatMetadata());
 }
 
 void SafeBrowsingResourceThrottle::ResumeRequest() {
   CHECK_EQ(state_, STATE_NONE);
   CHECK_NE(defer_state_, DEFERRED_NONE);
 
   bool resume = true;
   if (defer_state_ == DEFERRED_UNCHECKED_REDIRECT) {
     // Save the redirect urls for possible malware detail reporting later.
     redirect_urls_.push_back(unchecked_redirect_url_);
     if (!CheckUrl(unchecked_redirect_url_)) {
       // We're now waiting for the unchecked_redirect_url_.
       defer_state_ = DEFERRED_REDIRECT;
       resume = false;
       BeginNetLogEvent(NetLogEventType::SAFE_BROWSING_DEFERRED,
                        unchecked_redirect_url_, "defer_reason",
                        "resumed_redirect");
     }
   }
 
   if (resume) {
     defer_state_ = DEFERRED_NONE;
     controller()->Resume();
   }
 }