Use DiscardableMemoryManager on Android.

base/memory/discardable_memory_manager.cc

 // 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.
 
 #include "base/memory/discardable_memory_manager.h"
 
 #include "base/bind.h"
 #include "base/containers/hash_tables.h"
 #include "base/containers/mru_cache.h"
 #include "base/debug/trace_event.h"
@@ skipping 96 matching lines @@
     if (bytes_required < memory_limit_)
       limit = memory_limit_ - bytes_required;
 
     PurgeLRUWithLockAcquiredUntilUsageIsWithin(limit);
   }
 
   // Check for overflow.
   if (std::numeric_limits<size_t>::max() - bytes_required < bytes_allocated_)
     return false;
 
-  *purged = !allocation->AllocateAndAcquireLock(info->bytes);
+  *purged = !allocation->AllocateAndAcquireLock();
   info->purgable = false;
   if (bytes_required) {
     bytes_allocated_ += bytes_required;
     BytesAllocatedChanged();
   }
   return true;
 }
 
 void DiscardableMemoryManager::ReleaseLock(Allocation* allocation) {
   AutoLock lock(lock_);
@@ skipping 89 matching lines @@
 void DiscardableMemoryManager::EnforcePolicyWithLockAcquired() {
   PurgeLRUWithLockAcquiredUntilUsageIsWithin(memory_limit_);
 }
 
 void DiscardableMemoryManager::BytesAllocatedChanged() const {
   TRACE_COUNTER_ID1("base", "DiscardableMemoryUsage", this, bytes_allocated_);
 }
 
 }  // namespace internal
 }  // namespace base