Revert of Add SafeBrowsingNavigationObserver to listen to navigation events

chrome/browser/safe_browsing/safe_browsing_navigation_observer.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.h"
-
-#include "base/memory/ptr_util.h"
-#include "base/time/time.h"
-#include "chrome/browser/safe_browsing/safe_browsing_navigation_observer_manager.h"
-#include "chrome/browser/sessions/session_tab_helper.h"
-#include "content/public/browser/navigation_handle.h"
-#include "content/public/browser/render_frame_host.h"
-#include "content/public/browser/resource_request_details.h"
-#include "content/public/browser/web_contents.h"
-#include "content/public/common/resource_type.h"
-
-using content::WebContents;
-
-namespace {
-const char kWebContentsUserDataKey[] =
-    "web_contents_safe_browsing_navigation_observer";
-}  // namespace
-
-namespace safe_browsing {
-
-// SafeBrowsingNavigationObserver::NavigationEvent-----------------------------
-NavigationEvent::NavigationEvent()
-    : source_url(),
-      source_main_frame_url(),
-      original_request_url(),
-      destination_url(),
-      source_tab_id(-1),
-      target_tab_id(-1),
-      frame_id(-1),
-      last_updated(base::Time::Now()),
-      is_user_initiated(false),
-      has_committed(false),
-      has_server_redirect(false) {}
-
-NavigationEvent::NavigationEvent(NavigationEvent&& nav_event)
-    : source_url(std::move(nav_event.source_url)),
-      source_main_frame_url(std::move(nav_event.source_main_frame_url)),
-      original_request_url(std::move(nav_event.original_request_url)),
-      destination_url(std::move(nav_event.destination_url)),
-      source_tab_id(std::move(nav_event.source_tab_id)),
-      target_tab_id(std::move(nav_event.target_tab_id)),
-      frame_id(nav_event.frame_id),
-      last_updated(nav_event.last_updated),
-      is_user_initiated(nav_event.is_user_initiated),
-      has_committed(nav_event.has_committed),
-      has_server_redirect(nav_event.has_server_redirect) {}
-
-NavigationEvent& NavigationEvent::operator=(NavigationEvent&& nav_event) {
-  source_url = std::move(nav_event.source_url);
-  source_main_frame_url = std::move(nav_event.source_main_frame_url);
-  original_request_url = std::move(nav_event.original_request_url);
-  destination_url = std::move(nav_event.destination_url);
-  source_tab_id = nav_event.source_tab_id;
-  target_tab_id = nav_event.target_tab_id;
-  frame_id = nav_event.frame_id;
-  last_updated = nav_event.last_updated;
-  is_user_initiated = nav_event.is_user_initiated;
-  has_committed = nav_event.has_committed;
-  has_server_redirect = nav_event.has_server_redirect;
-  return *this;
-}
-
-NavigationEvent::~NavigationEvent() {}
-
-// SafeBrowsingNavigationObserver --------------------------------------------
-
-// static
-void SafeBrowsingNavigationObserver::MaybeCreateForWebContents(
-    content::WebContents* web_contents) {
-  if (FromWebContents(web_contents))
-    return;
-  // TODO(jialiul): This method will be called by TabHelpers::AttachTabHelpers.
-  // Complete this method when the entire class is ready.
-  NOTIMPLEMENTED();
-}
-
-// static
-SafeBrowsingNavigationObserver* SafeBrowsingNavigationObserver::FromWebContents(
-    content::WebContents* web_contents) {
-  return static_cast<SafeBrowsingNavigationObserver*>(
-      web_contents->GetUserData(kWebContentsUserDataKey));
-}
-
-SafeBrowsingNavigationObserver::SafeBrowsingNavigationObserver(
-    content::WebContents* contents,
-    const scoped_refptr<SafeBrowsingNavigationObserverManager>& manager)
-    : content::WebContentsObserver(contents),
-      manager_(manager),
-      has_user_gesture_(false),
-      last_user_gesture_timestamp_(base::Time()) {}
-
-SafeBrowsingNavigationObserver::~SafeBrowsingNavigationObserver() {}
-
-// Called when a navigation starts in the WebContents. |navigation_handle|
-// parameter is unique to this navigation, which will appear in the following
-// DidRedirectNavigation, and DidFinishNavigation too.
-void SafeBrowsingNavigationObserver::DidStartNavigation(
-    content::NavigationHandle* navigation_handle) {
-  NavigationEvent nav_event;
-  auto it = navigation_handle_map_.find(navigation_handle);
-  // It is possible to see multiple DidStartNavigation(..) with the same
-  // navigation_handle (e.g. cross-process transfer). If that's the case,
-  // we need to copy the is_user_initiated field.
-  if (it != navigation_handle_map_.end()) {
-    nav_event.is_user_initiated = it->second.is_user_initiated;
-  } else {
-    // If this is the first time we see this navigation_handle, create a new
-    // NavigationEvent, and decide if it is triggered by user.
-    if ((has_user_gesture_ &&
-         !SafeBrowsingNavigationObserverManager::IsUserGestureExpired(
-             last_user_gesture_timestamp_)) ||
-        !navigation_handle->IsRendererInitiated()) {
-      nav_event.is_user_initiated = has_user_gesture_;
-      manager_->OnUserGestureConsumed(web_contents(),
-                                      last_user_gesture_timestamp_);
-    }
-    has_user_gesture_ = false;
-  }
-
-  // All the other fields are reconstructed based on current content of
-  // navigation_handle.
-  nav_event.frame_id = navigation_handle->GetFrameTreeNodeId();
-
-  // If there was a URL previously committed in the current RenderFrameHost,
-  // set it as the source url of this navigation. Otherwise, this is the
-  // first url going to commit in this frame. We set navigation_handle's URL as
-  // the source url.
-  // TODO(jialiul): source_url, source_tab_id, and source_main_frame_url may be
-  // incorrect when another frame is targeting this frame. Need to refine this
-  // logic after the true initiator details are added to NavigationHandle
-  // (https://crbug.com/651895).
-  content::RenderFrameHost* current_frame_host =
-      navigation_handle->GetWebContents()->FindFrameByFrameTreeNodeId(
-          nav_event.frame_id);
-  if (current_frame_host &&
-      current_frame_host->GetLastCommittedURL().is_valid()) {
-    nav_event.source_url = SafeBrowsingNavigationObserverManager::ClearEmptyRef(
-        current_frame_host->GetLastCommittedURL());
-  }
-  nav_event.original_request_url =
-      SafeBrowsingNavigationObserverManager::ClearEmptyRef(
-          navigation_handle->GetURL());
-  nav_event.destination_url = nav_event.original_request_url;
-
-  nav_event.source_tab_id =
-      SessionTabHelper::IdForTab(navigation_handle->GetWebContents());
-
-  if (navigation_handle->IsInMainFrame()) {
-    nav_event.source_main_frame_url = nav_event.source_url;
-  } else {
-    nav_event.source_main_frame_url =
-        SafeBrowsingNavigationObserverManager::ClearEmptyRef(
-            navigation_handle->GetWebContents()->GetLastCommittedURL());
-  }
-  navigation_handle_map_[navigation_handle] = std::move(nav_event);
-}
-
-void SafeBrowsingNavigationObserver::DidRedirectNavigation(
-    content::NavigationHandle* navigation_handle) {
-  // We should have already seen this navigation_handle in DidStartNavigation.
-  if (navigation_handle_map_.find(navigation_handle) ==
-      navigation_handle_map_.end()) {
-    NOTREACHED();
-    return;
-  }
-
-  NavigationEvent* nav_event = &navigation_handle_map_[navigation_handle];
-  nav_event->has_server_redirect = true;
-  nav_event->destination_url =
-      SafeBrowsingNavigationObserverManager::ClearEmptyRef(
-          navigation_handle->GetURL());
-  nav_event->last_updated = base::Time::Now();
-}
-
-void SafeBrowsingNavigationObserver::DidFinishNavigation(
-    content::NavigationHandle* navigation_handle) {
-  if (navigation_handle_map_.find(navigation_handle) ==
-      navigation_handle_map_.end()) {
-    NOTREACHED();
-    return;
-  }
-
-  // If it is an error page, we ignore this navigation.
-  if (navigation_handle->IsErrorPage()) {
-    navigation_handle_map_.erase(navigation_handle);
-    return;
-  }
-  NavigationEvent* nav_event = &navigation_handle_map_[navigation_handle];
-
-  nav_event->has_committed = navigation_handle->HasCommitted();
-  nav_event->target_tab_id =
-      SessionTabHelper::IdForTab(navigation_handle->GetWebContents());
-  nav_event->last_updated = base::Time::Now();
-
-  manager_->RecordNavigationEvent(nav_event->destination_url, nav_event);
-  navigation_handle_map_.erase(navigation_handle);
-}
-
-void SafeBrowsingNavigationObserver::DidGetResourceResponseStart(
-    const content::ResourceRequestDetails& details) {
-  // We only care about main frame and sub frame.
-  if (details.resource_type != content::RESOURCE_TYPE_MAIN_FRAME &&
-      details.resource_type != content::RESOURCE_TYPE_SUB_FRAME) {
-    return;
-  }
-  if (!details.url.is_valid() || details.socket_address.IsEmpty())
-    return;
-
-  manager_->RecordHostToIpMapping(details.url.host(),
-                                  details.socket_address.host());
-}
-
-void SafeBrowsingNavigationObserver::DidGetUserInteraction(
-    const blink::WebInputEvent::Type type) {
-  last_user_gesture_timestamp_ = base::Time::Now();
-  has_user_gesture_ = true;
-  // TODO (jialiul): Refine user gesture logic when DidOpenRequestedURL
-  // covers all retargetting cases.
-  manager_->RecordUserGestureForWebContents(web_contents(),
-                                            last_user_gesture_timestamp_);
-}
-
-void SafeBrowsingNavigationObserver::WebContentsDestroyed() {
-  manager_->OnWebContentDestroyed(web_contents());
-  web_contents()->RemoveUserData(kWebContentsUserDataKey);
-  // web_contents is null after this function.
-}
-
-}  // namespace safe_browsing