Move frame eviction into components

content/browser/renderer_host/renderer_frame_manager.h

Index: content/browser/renderer_host/renderer_frame_manager.h
diff --git a/content/browser/renderer_host/renderer_frame_manager.h b/content/browser/renderer_host/renderer_frame_manager.h
deleted file mode 100644
index b8600d356efa7dcaaabd4144b27aa1750c53c181..0000000000000000000000000000000000000000
--- a/content/browser/renderer_host/renderer_frame_manager.h
+++ /dev/null
@@ -1,87 +0,0 @@
-// Copyright 2013 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 CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_
-#define CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_
-
-#include <stddef.h>
-
-#include <list>
-#include <map>
-
-#include "base/macros.h"
-#include "base/memory/memory_coordinator_client.h"
-#include "base/memory/memory_pressure_listener.h"
-#include "base/memory/singleton.h"
-#include "content/common/content_export.h"
-
-namespace content {
-
-class RenderWidgetHostViewAuraTest;
-
-class CONTENT_EXPORT RendererFrameManagerClient {
- public:
-  virtual ~RendererFrameManagerClient() {}
-  virtual void EvictCurrentFrame() = 0;
-};
-
-// This class is responsible for globally managing which renderers keep their
-// compositor frame when offscreen. We actively discard compositor frames for
-// offscreen tabs, but keep a minimum amount, as an LRU cache, to make switching
-// between a small set of tabs faster. The limit is a soft limit, because
-// clients can lock their frame to prevent it from being discarded, e.g. if the
-// tab is visible, or while capturing a screenshot.
-class CONTENT_EXPORT RendererFrameManager :
-    public base::MemoryCoordinatorClient {
- public:
-  static RendererFrameManager* GetInstance();
-
-  void AddFrame(RendererFrameManagerClient*, bool locked);
-  void RemoveFrame(RendererFrameManagerClient*);
-  void LockFrame(RendererFrameManagerClient*);
-  void UnlockFrame(RendererFrameManagerClient*);
-
-  size_t GetMaxNumberOfSavedFrames() const;
-
-  // For testing only
-  void set_max_number_of_saved_frames(size_t max_number_of_saved_frames) {
-    max_number_of_saved_frames_ = max_number_of_saved_frames;
-  }
-  void set_max_handles(float max_handles) { max_handles_ = max_handles; }
-
- private:
-  // Please remove when crbug.com/443824 has been fixed.
-  friend class RenderWidgetHostViewAuraTest;
-
-  RendererFrameManager();
-  ~RendererFrameManager() override;
-
-  // base::MemoryCoordinatorClient implementation:
-  void OnPurgeMemory() override;
-
-  void CullUnlockedFrames(size_t saved_frame_limit);
-
-  // React on memory pressure events to adjust the number of cached frames.
-  void OnMemoryPressure(
-      base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level);
-
-  void PurgeMemory(int percentage);
-
-  friend struct base::DefaultSingletonTraits<RendererFrameManager>;
-
-  // Listens for system under pressure notifications and adjusts number of
-  // cached frames accordingly.
-  std::unique_ptr<base::MemoryPressureListener> memory_pressure_listener_;
-
-  std::map<RendererFrameManagerClient*, size_t> locked_frames_;
-  std::list<RendererFrameManagerClient*> unlocked_frames_;
-  size_t max_number_of_saved_frames_;
-  float max_handles_;
-
-  DISALLOW_COPY_AND_ASSIGN(RendererFrameManager);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_RENDERER_HOST_RENDERER_FRAME_MANAGER_H_