Hosting the discardable memory service in the mus process

components/discardable_memory/client/client_discardable_shared_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 "components/discardable_memory/client/client_discardable_shared_memory_manager.h"
 
 #include <inttypes.h>
 
 #include <algorithm>
 #include <utility>
@@ skipping 110 matching lines @@
     MemoryUsageChanged(0, 0);
 
   // Releasing the |heap_| before posting a task for deleting |manager_mojo_|.
   // It is because releasing |heap_| will invoke DeletedDiscardableSharedMemory
   // which needs |manager_mojo_|.
   heap_.reset();
 
   // Delete the |manager_mojo_| on IO thread, so any pending tasks on IO thread
   // will be executed before the |manager_mojo_| is deleted.
   bool posted = io_task_runner_->DeleteSoon(FROM_HERE, manager_mojo_.release());
-  DCHECK(posted);
+  if (!posted)
+    manager_mojo_.reset();
 }
 
 std::unique_ptr<base::DiscardableMemory>
 ClientDiscardableSharedMemoryManager::AllocateLockedDiscardableMemory(
     size_t size) {
   base::AutoLock lock(lock_);
 
   DCHECK_NE(size, 0u);
 
   auto size_in_kb = static_cast<base::HistogramBase::Sample>(size / 1024);
@@ skipping 271 matching lines @@
       "discardable-memory-allocated";
   base::debug::SetCrashKeyValue(kDiscardableMemoryAllocatedKey,
                                 base::Uint64ToString(new_bytes_total));
 
   static const char kDiscardableMemoryFreeKey[] = "discardable-memory-free";
   base::debug::SetCrashKeyValue(kDiscardableMemoryFreeKey,
                                 base::Uint64ToString(new_bytes_free));
 }
 
 }  // namespace discardable_memory