Revert of Add MemoryCoordinator

components/memory_coordinator/browser/memory_coordinator.h

-// 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 COMPONENTS_MEMORY_COORDINATOR_BROWSER_MEMORY_COORDINATOR_H_
-#define COMPONENTS_MEMORY_COORDINATOR_BROWSER_MEMORY_COORDINATOR_H_
-
-#include "components/memory_coordinator/public/interfaces/memory_coordinator.mojom.h"
-#include "mojo/public/cpp/bindings/binding.h"
-
-namespace memory_coordinator {
-
-class MemoryCoordinatorHandleImpl;
-
-// MemoryCoordinator is responsible for the whole memory management accross the
-// browser and child proceeses. It will dispatch memory events to its clients
-// and child processes based on its best knowledge of the memory usage.
-class MemoryCoordinator {
- public:
-  MemoryCoordinator();
-  ~MemoryCoordinator();
-
-  void CreateHandle(int render_process_id,
-                    mojom::MemoryCoordinatorHandleRequest request);
-
-  // Returns number of children. Only used for testing.
-  size_t NumChildrenForTesting();
-
- private:
-  void OnConnectionError(int render_process_id);
-
-  // Mappings of RenderProcessHost::GetID() -> MemoryCoordinatorHandleImpl.
-  // A mapping is added when a renderer connects to MemoryCoordinator and
-  // removed automatically when a underlying binding is disconnected.
-  std::map<int, std::unique_ptr<MemoryCoordinatorHandleImpl>> children_;
-
-  DISALLOW_COPY_AND_ASSIGN(MemoryCoordinator);
-};
-
-}  // memory_coordinator
-
-#endif  // COMPONENTS_MEMORY_COORDINATOR_BROWSER_MEMORY_COORDINATOR_H_