Revert of Add SafeBrowsingNavigationObserver to listen to navigation events

chrome/browser/safe_browsing/safe_browsing_navigation_observer_manager.cc

-// Copyright 2016 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/safe_browsing/safe_browsing_navigation_observer_manager.h"
-
-#include "base/memory/ptr_util.h"
-#include "base/time/time.h"
-#include "chrome/browser/chrome_notification_types.h"
-#include "chrome/browser/safe_browsing/safe_browsing_navigation_observer.h"
-#include "chrome/browser/sessions/session_tab_helper.h"
-#include "chrome/browser/tab_contents/retargeting_details.h"
-#include "content/public/browser/navigation_details.h"
-#include "content/public/browser/notification_service.h"
-#include "content/public/browser/notification_types.h"
-#include "content/public/browser/render_frame_host.h"
-#include "content/public/browser/render_process_host.h"
-#include "content/public/browser/web_contents.h"
-
-using content::WebContents;
-
-namespace safe_browsing {
-
-// The expiration period of a user gesture. Any user gesture that happened 1.0
-// second ago will be considered as expired and not relevant to upcoming
-// navigation events.
-static const double kUserGestureTTLInSecond = 1.0;
-
-// static
-bool SafeBrowsingNavigationObserverManager::IsUserGestureExpired(
-    const base::Time& timestamp) {
-  double now = base::Time::Now().ToDoubleT();
-  double timestamp_in_double = timestamp.ToDoubleT();
-
-  if (now <= timestamp_in_double)
-    return true;
-  return (now - timestamp_in_double) > kUserGestureTTLInSecond;
-}
-
-// static
-GURL SafeBrowsingNavigationObserverManager::ClearEmptyRef(const GURL& url) {
-  if (url.has_ref() && url.ref().empty()) {
-    url::Replacements<char> replacements;
-    replacements.ClearRef();
-    return url.ReplaceComponents(replacements);
-  }
-  return url;
-}
-
-SafeBrowsingNavigationObserverManager::SafeBrowsingNavigationObserverManager() {
-  registrar_.Add(this, chrome::NOTIFICATION_RETARGETING,
-                 content::NotificationService::AllSources());
-}
-
-void SafeBrowsingNavigationObserverManager::RecordNavigationEvent(
-    const GURL& nav_event_key,
-    NavigationEvent* nav_event) {
-  auto insertion_result = navigation_map_.insert(
-      std::make_pair(nav_event_key, std::vector<NavigationEvent>()));
-
-  insertion_result.first->second.push_back(std::move(*nav_event));
-}
-
-void SafeBrowsingNavigationObserverManager::RecordUserGestureForWebContents(
-    content::WebContents* web_contents,
-    const base::Time& timestamp) {
-  auto insertion_result =
-      user_gesture_map_.insert(std::make_pair(web_contents, timestamp));
-  // Update the timestamp if entry already exists.
-  if (!insertion_result.second)
-    insertion_result.first->second = timestamp;
-}
-
-void SafeBrowsingNavigationObserverManager::OnUserGestureConsumed(
-    content::WebContents* web_contents,
-    const base::Time& timestamp) {
-  auto it = user_gesture_map_.find(web_contents);
-  // Remove entry from |user_gesture_map_| as a user_gesture is consumed by
-  // a navigation event.
-  if (it != user_gesture_map_.end() && timestamp >= it->second)
-    user_gesture_map_.erase(it);
-}
-
-void SafeBrowsingNavigationObserverManager::RecordHostToIpMapping(
-    const std::string& host,
-    const std::string& ip) {
-  auto insert_result = host_to_ip_map_.insert(
-      std::make_pair(host, std::vector<ResolvedIPAddress>()));
-  if (!insert_result.second) {
-    // host_to_ip_map already contains this key.
-    // If this IP is already in the vector, we update its timestamp.
-    for (auto& vector_entry : insert_result.first->second) {
-      if (vector_entry.ip == host) {
-        vector_entry.timestamp = base::Time::Now();
-        return;
-      }
-    }
-  }
-  // If this is a new IP of this host, and we added to the end of the vector.
-  insert_result.first->second.push_back(
-      ResolvedIPAddress(base::Time::Now(), ip));
-}
-
-void SafeBrowsingNavigationObserverManager::OnWebContentDestroyed(
-    content::WebContents* web_contents) {
-  user_gesture_map_.erase(web_contents);
-  // TODO (jialiul): Will add other clean up tasks shortly.
-}
-
-SafeBrowsingNavigationObserverManager::
-    ~SafeBrowsingNavigationObserverManager() {}
-
-void SafeBrowsingNavigationObserverManager::Observe(
-    int type,
-    const content::NotificationSource& source,
-    const content::NotificationDetails& details) {
-  if (type == chrome::NOTIFICATION_RETARGETING)
-    RecordRetargeting(details);
-}
-
-void SafeBrowsingNavigationObserverManager::RecordRetargeting(
-    const content::NotificationDetails& details) {
-  const RetargetingDetails* retargeting_detail =
-      content::Details<const RetargetingDetails>(details).ptr();
-  DCHECK(retargeting_detail);
-  content::WebContents* source_contents =
-      retargeting_detail->source_web_contents;
-  content::WebContents* target_contents =
-      retargeting_detail->target_web_contents;
-  DCHECK(source_contents);
-  DCHECK(target_contents);
-
-  content::RenderFrameHost* rfh = content::RenderFrameHost::FromID(
-      retargeting_detail->source_render_process_id,
-      retargeting_detail->source_render_frame_id);
-  // Remove the "#" at the end of URL, since it does not point to any actual
-  // page fragment ID.
-  GURL target_url = SafeBrowsingNavigationObserverManager::ClearEmptyRef(
-      retargeting_detail->target_url);
-
-  NavigationEvent nav_event;
-  if (rfh) {
-    nav_event.source_url = SafeBrowsingNavigationObserverManager::ClearEmptyRef(
-        rfh->GetLastCommittedURL());
-  }
-  nav_event.source_tab_id = SessionTabHelper::IdForTab(source_contents);
-  nav_event.source_main_frame_url =
-      SafeBrowsingNavigationObserverManager::ClearEmptyRef(
-          source_contents->GetLastCommittedURL());
-  nav_event.original_request_url = target_url;
-  nav_event.destination_url = target_url;
-  nav_event.target_tab_id = SessionTabHelper::IdForTab(target_contents);
-  nav_event.frame_id = rfh ? rfh->GetFrameTreeNodeId() : -1;
-  auto it = user_gesture_map_.find(source_contents);
-  if (it != user_gesture_map_.end() &&
-      !SafeBrowsingNavigationObserverManager::IsUserGestureExpired(
-          it->second)) {
-    nav_event.is_user_initiated = true;
-    OnUserGestureConsumed(it->first, it->second);
-  } else {
-    nav_event.is_user_initiated = false;
-  }
-
-  auto insertion_result = navigation_map_.insert(
-      std::make_pair(target_url, std::vector<NavigationEvent>()));
-  insertion_result.first->second.push_back(std::move(nav_event));
-}
-
-}  // namespace safe_browsing