Revert of Add SafeBrowsingNavigationObserver to listen to navigation events

chrome/browser/safe_browsing/safe_browsing_navigation_observer.h

Index: chrome/browser/safe_browsing/safe_browsing_navigation_observer.h
diff --git a/chrome/browser/safe_browsing/safe_browsing_navigation_observer.h b/chrome/browser/safe_browsing/safe_browsing_navigation_observer.h
deleted file mode 100644
index 3a659ea7d881decd67988cb06a0422b268b1334f..0000000000000000000000000000000000000000
--- a/chrome/browser/safe_browsing/safe_browsing_navigation_observer.h
+++ /dev/null
@@ -1,114 +0,0 @@
-// 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.
-
-#ifndef CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_NAVIGATION_OBSERVER_H_
-#define CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_NAVIGATION_OBSERVER_H_
-
-#include "base/supports_user_data.h"
-#include "content/public/browser/web_contents_observer.h"
-#include "url/gurl.h"
-
-namespace content {
-class NavigationHandle;
-struct ResourceRedirectDetails;
-}
-
-namespace safe_browsing {
-class SafeBrowsingNavigationObserverManager;
-
-// Struct to record the details of a navigation event for any frame.
-// This information will be used to fill |url_chain| field in safe browsing
-// download pings.
-struct NavigationEvent {
-  NavigationEvent();
-  NavigationEvent(NavigationEvent&& nav_event);
-  NavigationEvent& operator=(NavigationEvent&& nav_event);
-  ~NavigationEvent();
-
-  GURL source_url;  // URL that caused this navigation to occur.
-                    // TODO(jialiul): source_url may be incorrect when
-                    // navigation involves frames targeting each other.
-                    // http://crbug.com/651895.
-  GURL source_main_frame_url;  // Main frame url of the source_url. Could be the
-                               // same as source_url, if source_url was loaded
-                               // in main frame.
-  GURL original_request_url;   // The original request URL of this navigation.
-  GURL destination_url;        // The actual destination url of this navigation
-                               // event. If this navigation has server side
-                               // redirect(s), actual_target_url will be
-                               // different from initial_request_url.
-  int source_tab_id;  // Which tab contains the frame with source_url. Tab ID is
-                      // returned by SessionTabHelper::IdForTab. This ID is
-                      // immutable for a given tab and unique across Chrome
-                      // within the current session.
-  int target_tab_id;  // Which tab this request url is targeting to.
-  int frame_id;  // Frame tree node ID of the frame where this navigation takes
-                 // place.
-  base::Time last_updated;  // When this NavigationEvent was last updated.
-  bool is_user_initiated;  // browser_initiated || has_user_gesture.
-  bool has_committed;
-  bool has_server_redirect;
-};
-
-// Structure to keep track of resolved IP address of a host.
-struct ResolvedIPAddress {
-  ResolvedIPAddress() : timestamp(base::Time::Now()), ip() {}
-  ResolvedIPAddress(base::Time timestamp, const std::string& ip)
-      : timestamp(timestamp), ip(ip) {}
-  base::Time timestamp;  // Timestamp of when we get the resolved IP.
-  std::string ip;        // Resolved IP address
-};
-
-// Observes the navigation events for a single WebContents (both main-frame
-// and sub-frame navigations).
-class SafeBrowsingNavigationObserver : public base::SupportsUserData::Data,
-                                       public content::WebContentsObserver {
- public:
-  static void MaybeCreateForWebContents(content::WebContents* web_contents);
-  static SafeBrowsingNavigationObserver* FromWebContents(
-      content::WebContents* web_contents);
-
-  SafeBrowsingNavigationObserver(
-      content::WebContents* contents,
-      const scoped_refptr<SafeBrowsingNavigationObserverManager>& manager);
-
-  ~SafeBrowsingNavigationObserver() override;
-
- private:
-  typedef std::unordered_map<content::NavigationHandle*, NavigationEvent>
-      NavigationHandleMap;
-
-  // content::WebContentsObserver:
-  void DidStartNavigation(
-      content::NavigationHandle* navigation_handle) override;
-  void DidRedirectNavigation(
-      content::NavigationHandle* navigation_handle) override;
-  void DidFinishNavigation(
-      content::NavigationHandle* navigation_handle) override;
-  void DidGetResourceResponseStart(
-      const content::ResourceRequestDetails& details) override;
-  void DidGetUserInteraction(const blink::WebInputEvent::Type type) override;
-  void WebContentsDestroyed() override;
-
-  // Map keyed on NavigationHandle* to keep track of all the ongoing navigation
-  // events. NavigationHandle pointers are owned by RenderFrameHost. Since a
-  // NavigationHandle object will be destructed after navigation is done,
-  // at the end of DidFinishNavigation(...) corresponding entries in this map
-  // will be removed from navigation_handle_map_ and added to
-  // SafeBrowsingNavigationObserverManager::navigation_map_.
-  NavigationHandleMap navigation_handle_map_;
-
-  scoped_refptr<SafeBrowsingNavigationObserverManager> manager_;
-
-  // If the observed WebContents just got an user gesture.
-  bool has_user_gesture_;
-
-  base::Time last_user_gesture_timestamp_;
-
-  DISALLOW_COPY_AND_ASSIGN(SafeBrowsingNavigationObserver);
-};
-
-}  // namespace safe_browsing
-
-#endif  // CHROME_BROWSER_SAFE_BROWSING_SAFE_BROWSING_NAVIGATION_OBSERVER_H_