Revert of Encapsulate CSS selector declarative content condition tracking

chrome/browser/extensions/api/declarative_content/declarative_content_css_condition_tracker.h

-// Copyright 2015 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_EXTENSIONS_API_DECLARATIVE_CONTENT_DECLARATIVE_CONTENT_CSS_CONDITION_TRACKER_H_
-#define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_DECLARATIVE_CONTENT_CSS_CONDITION_TRACKER_H_
-
-#include <map>
-#include <set>
-#include <string>
-#include <vector>
-
-#include "base/callback.h"
-#include "base/containers/hash_tables.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-#include "content/public/browser/web_contents_observer.h"
-
-
-namespace content {
-class BrowserContext;
-struct FrameNavigateParams;
-struct LoadCommittedDetails;
-class RenderProcessHost;
-class WebContents;
-}
-
-namespace extensions {
-
-// Interface that allows the DeclarativeContentCssConditionTracker to request
-// condition evaluation, and shields it from having to know about Browsers.
-class DeclarativeContentCssConditionTrackerDelegate {
- public:
-  // Callback for per-tab invocations.
-  using WebContentsCallback =
-      base::Callback<void(content::WebContents* content)>;
-
-  // Requests re-evaluation of conditions for |contents|.
-  virtual void RequestEvaluation(content::WebContents* contents) = 0;
-
-  // Returns true if the evaluator should manage condition state for |context|.
-  virtual bool ShouldManageConditionsForBrowserContext(
-      content::BrowserContext* context) = 0;
-
- protected:
-  DeclarativeContentCssConditionTrackerDelegate();
-  virtual ~DeclarativeContentCssConditionTrackerDelegate();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(DeclarativeContentCssConditionTrackerDelegate);
-};
-
-// Supports watching of CSS selectors to across tab contents in a browser
-// context, and querying for the matching CSS selectors for a context.
-class DeclarativeContentCssConditionTracker
-    : public content::NotificationObserver {
- public:
-  DeclarativeContentCssConditionTracker(
-      content::BrowserContext* context,
-      DeclarativeContentCssConditionTrackerDelegate* delegate);
-  ~DeclarativeContentCssConditionTracker() override;
-
-  // Sets the set of CSS selectors to watch for CSS condition evaluation.
-  void SetWatchedCssSelectors(
-      const std::set<std::string>& watched_css_selectors);
-
-  // Requests that CSS conditions be tracked for |contents|.
-  void TrackForWebContents(content::WebContents* contents);
-
-  // Handles navigation of |contents|. We depend on the caller to notify us of
-  // this event rather than listening for it ourselves, so that the caller can
-  // coordinate evaluation with all the trackers that respond to it. If we
-  // listened ourselves and requested rule evaluation before another tracker
-  // received the notification, our conditions would be evaluated based on the
-  // new URL while the other tracker's conditions would still be evaluated based
-  // on the previous URL.
-  void OnWebContentsNavigation(content::WebContents* contents,
-                               const content::LoadCommittedDetails& details,
-                               const content::FrameNavigateParams& params);
-
-  // Inserts the currently-matching CSS selectors into |css_selectors|. We use
-  // hash_set for maximally efficient lookup.
-  void GetMatchingCssSelectors(content::WebContents* contents,
-                               base::hash_set<std::string>* css_selectors);
-
-  // TODO(wittman): Remove once DeclarativeChromeContentRulesRegistry no longer
-  // depends on concrete condition implementations. At that point
-  // DeclarativeChromeContentRulesRegistryTest.ActiveRulesDoesntGrow will be
-  // able to use a test condition object and not need to depend on force setting
-  // matching CSS seleectors.
-  void UpdateMatchingCssSelectorsForTesting(
-      content::WebContents* contents,
-      const std::vector<std::string>& matching_css_selectors);
-
- private:
-  class PerWebContentsTracker;
-
-  // Instantiate a PerWebContentsTracker watching |contents|.
-  void CreatePerWebContentsTracker(content::WebContents* contents);
-
-  // content::NotificationObserver implementation.
-  void Observe(int type,
-               const content::NotificationSource& source,
-               const content::NotificationDetails& details) override;
-
-  // If the renderer process is associated with our browser context, tells it
-  // what page attributes to watch for using an ExtensionMsg_WatchPages.
-  void InstructRenderProcessIfManagingBrowserContext(
-      content::RenderProcessHost* process);
-
-  // Called by PerWebContentsTracker on destruction.
-  void RemovePerWebContentsTracker(PerWebContentsTracker* tracker);
-
-  // The context whose state we're monitoring for evaluation.
-  content::BrowserContext* context_;
-
-  // All CSS selectors that are watched for by any rule's conditions. This
-  // vector is sorted by construction.
-  std::vector<std::string> watched_css_selectors_;
-
-  // Maps WebContents to the tracker for that WebContents
-  // state. PerWebContentsTracker owns itself, so this pointer is weak.
-  std::map<content::WebContents*, PerWebContentsTracker*>
-      per_web_contents_tracker_;
-
-  // Weak.
-  DeclarativeContentCssConditionTrackerDelegate* delegate_;
-
-  // Manages our notification registrations.
-  content::NotificationRegistrar registrar_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeclarativeContentCssConditionTracker);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_CONTENT_DECLARATIVE_CONTENT_CSS_CONDITION_TRACKER_H_