[TabManager] Move TabManager into chrome/browser/resource_coordinator.

chrome/browser/memory/tab_manager_web_contents_data.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_MEMORY_TAB_MANAGER_WEB_CONTENTS_DATA_H_
-#define CHROME_BROWSER_MEMORY_TAB_MANAGER_WEB_CONTENTS_DATA_H_
-
-#include "base/macros.h"
-#include "base/time/time.h"
-#include "chrome/browser/memory/tab_manager.h"
-#include "content/public/browser/web_contents_observer.h"
-#include "content/public/browser/web_contents_user_data.h"
-
-namespace base {
-class TickClock;
-}
-
-namespace content {
-class WebContents;
-}
-
-namespace memory {
-
-// Internal class used by TabManager to record the needed data for
-// WebContentses.
-class TabManager::WebContentsData
-    : public content::WebContentsObserver,
-      public content::WebContentsUserData<TabManager::WebContentsData> {
- public:
-  explicit WebContentsData(content::WebContents* web_contents);
-  ~WebContentsData() override;
-
-  // WebContentsObserver implementation:
-  void DidStartLoading() override;
-  void WebContentsDestroyed() override;
-
-  // Returns true if the tab has been discarded to save memory.
-  bool IsDiscarded();
-
-  // Sets/clears the discard state of the tab.
-  void SetDiscardState(bool state);
-
-  // Returns the number of times the tab has been discarded.
-  int DiscardCount();
-
-  // Increments the number of times the tab has been discarded.
-  void IncrementDiscardCount();
-
-  // Returns true if audio has recently been audible.
-  bool IsRecentlyAudible();
-
-  // Set/clears the state of whether audio has recently been audible.
-  void SetRecentlyAudible(bool state);
-
-  // Returns the timestamp of the last time the tab changed its audio state.
-  base::TimeTicks LastAudioChangeTime();
-
-  // Sets the timestamp of the last time the tab changed its audio state.
-  void SetLastAudioChangeTime(base::TimeTicks timestamp);
-
-  // Returns the timestamp of the last time the tab changed became inactive.
-  base::TimeTicks LastInactiveTime();
-
-  // Sets the timestamp of the last time the tab became inactive.
-  void SetLastInactiveTime(base::TimeTicks timestamp);
-
-  // Copies the discard state from |old_contents| to |new_contents|.
-  static void CopyState(content::WebContents* old_contents,
-                        content::WebContents* new_contents);
-
-  // Used to set the test TickClock, which then gets used by NowTicks(). See
-  // |test_tick_clock_| for more details.
-  void set_test_tick_clock(base::TickClock* test_tick_clock);
-
-  // Returns the auto-discardable state of the tab.
-  // See tab_manager.h for more information.
-  bool IsAutoDiscardable();
-
-  // Sets/clears the auto-discardable state of the tab.
-  void SetAutoDiscardableState(bool state);
-
-  // Sets the current purge state.
-  // TODO(tasak): remove this after the logic is moved into
-  // MemoryCoordinator.
-  void set_is_purged(bool state) { is_purged_ = state; }
-
-  // Returns the current state of purge.
-  // TODO(tasak): remove this after the logic is moved into
-  // MemoryCoordinator.
-  bool is_purged() const { return is_purged_; }
-
-  // Sets the time to purge after the tab is backgrounded.
-  void set_time_to_purge(const base::TimeDelta& time_to_purge) {
-    time_to_purge_ = time_to_purge;
-  }
-
-  // Returns the time to first purge after the tab is backgrounded.
-  base::TimeDelta time_to_purge() const { return time_to_purge_; }
-
- private:
-  // Needed to access tab_data_.
-  FRIEND_TEST_ALL_PREFIXES(TabManagerWebContentsDataTest, CopyState);
-
-  struct Data {
-    Data();
-    bool operator==(const Data& right) const;
-    bool operator!=(const Data& right) const;
-
-    // Is the tab currently discarded?
-    bool is_discarded;
-    // Number of times the tab has been discarded.
-    int discard_count;
-    // Is the tab playing audio?
-    bool is_recently_audible;
-    // Last time the tab started or stopped playing audio (we record the
-    // transition time).
-    base::TimeTicks last_audio_change_time;
-    // The last time the tab was discarded.
-    base::TimeTicks last_discard_time;
-    // The last time the tab was reloaded after being discarded.
-    base::TimeTicks last_reload_time;
-    // The last time the tab switched from being active to inactive.
-    base::TimeTicks last_inactive_time;
-    // Site Engagement score (set to -1 if not available).
-    double engagement_score;
-    // Is tab eligible for auto discarding? Defaults to true.
-    bool is_auto_discardable;
-  };
-
-  // Returns either the system's clock or the test clock. See |test_tick_clock_|
-  // for more details.
-  base::TimeTicks NowTicks() const;
-
-  // Contains all the needed data for the tab.
-  Data tab_data_;
-
-  // Pointer to a test clock. If this is set, NowTicks() returns the value of
-  // this test clock. Otherwise it returns the system clock's value.
-  base::TickClock* test_tick_clock_;
-
-  // The time to purge after the tab is backgrounded.
-  base::TimeDelta time_to_purge_;
-
-  // True if the tab has been purged.
-  bool is_purged_;
-
-  DISALLOW_COPY_AND_ASSIGN(WebContentsData);
-};
-
-}  // namespace memory
-
-#endif  // CHROME_BROWSER_MEMORY_TAB_MANAGER_WEB_CONTENTS_DATA_H_