Revert 267170 "Use DiscardableMemoryManager on Android."

trunk/src/base/memory/discardable_memory_manager.h

 // Copyright 2014 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 BASE_MEMORY_DISCARDABLE_MEMORY_MANAGER_H_
 #define BASE_MEMORY_DISCARDABLE_MEMORY_MANAGER_H_
 
 #include "base/base_export.h"
 #include "base/containers/hash_tables.h"
 #include "base/containers/mru_cache.h"
 #include "base/memory/memory_pressure_listener.h"
 #include "base/synchronization/lock.h"
 
 namespace base {
 namespace internal {
 
 // This interface is used by the DiscardableMemoryManager class to provide some
 // level of userspace control over discardable memory allocations.
 class DiscardableMemoryManagerAllocation {
  public:
   // Allocate and acquire a lock that prevents the allocation from being purged
   // by the system. Returns true if memory was previously allocated and is still
   // resident.
-  virtual bool AllocateAndAcquireLock() = 0;
+  virtual bool AllocateAndAcquireLock(size_t bytes) = 0;
 
   // Release a previously acquired lock on the allocation so that it can be
   // purged by the system.
   virtual void ReleaseLock() = 0;
 
   // Explicitly purge this allocation. It is illegal to call this while a lock
   // is acquired on the allocation.
   virtual void Purge() = 0;
 
  protected:
@@ skipping 128 matching lines @@
   // pressure.
   scoped_ptr<MemoryPressureListener> memory_pressure_listener_;
 
   DISALLOW_COPY_AND_ASSIGN(DiscardableMemoryManager);
 };
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_MEMORY_DISCARDABLE_MEMORY_MANAGER_H_