Make HistoryBackend a client of memory coordinator

content/browser/browser_main_loop.h

 // Copyright (c) 2012 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_BROWSER_MAIN_LOOP_H_
 #define CONTENT_BROWSER_BROWSER_MAIN_LOOP_H_
 
 #include <memory>
 
 #include "base/files/file_path.h"
@@ skipping 32 matching lines @@
 #endif
 class UserInputMonitor;
 #if defined(OS_MACOSX)
 class DeviceMonitorMac;
 #endif
 namespace midi {
 class MidiManager;
 }  // namespace midi
 }  // namespace media
 
-namespace memory_coordinator {
-class MemoryCoordinator;
-}  // namespace memory_coordinator
-
 namespace mojo {
 namespace edk {
 class ScopedIPCSupport;
 }  // namespace edk
 }  // namespace mojo
 
 namespace net {
 class NetworkChangeNotifier;
 }  // namespace net
 
@@ skipping 74 matching lines @@
   bool is_tracing_startup_for_duration() const {
     return is_tracing_startup_for_duration_;
   }
 
   const base::FilePath& startup_trace_file() const {
     return startup_trace_file_;
   }
 
   void StopStartupTracingTimer();
 
-  memory_coordinator::MemoryCoordinator* memory_coordinator() const {
-    return memory_coordinator_.get();
-  }
-
 #if defined(OS_MACOSX) && !defined(OS_IOS)
   media::DeviceMonitorMac* device_monitor_mac() const {
     return device_monitor_mac_.get();
   }
 #endif
 
  private:
   class MemoryObserver;
 
   void InitializeMainThread();
@@ skipping 87 matching lines @@
   // Members initialized in |InitializeMainThread()| ---------------------------
   // This must get destroyed before other threads that are created in |parts_|.
   std::unique_ptr<BrowserThreadImpl> main_thread_;
 
   // Members initialized in |CreateStartupTasks()| -----------------------------
   std::unique_ptr<StartupTaskRunner> startup_task_runner_;
 
   // Members initialized in |PreCreateThreads()| -------------------------------
   // Torn down in ShutdownThreadsAndCleanUp.
   std::unique_ptr<base::MemoryPressureMonitor> memory_pressure_monitor_;
-  std::unique_ptr<memory_coordinator::MemoryCoordinator> memory_coordinator_;
 
   // Members initialized in |CreateThreads()| ----------------------------------
   std::unique_ptr<BrowserProcessSubThread> db_thread_;
   std::unique_ptr<BrowserProcessSubThread> file_user_blocking_thread_;
   std::unique_ptr<BrowserProcessSubThread> file_thread_;
   std::unique_ptr<BrowserProcessSubThread> process_launcher_thread_;
   std::unique_ptr<BrowserProcessSubThread> cache_thread_;
   std::unique_ptr<BrowserProcessSubThread> io_thread_;
 
   // Members initialized in |BrowserThreadsStarted()| --------------------------
@@ skipping 28 matching lines @@
   scoped_refptr<SaveFileManager> save_file_manager_;
 
   // DO NOT add members here. Add them to the right categories above.
 
   DISALLOW_COPY_AND_ASSIGN(BrowserMainLoop);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_MAIN_LOOP_H_