Re-write many calls to WrapUnique() with MakeUnique()

content/child/child_discardable_shared_memory_manager.cc

Index: content/child/child_discardable_shared_memory_manager.cc
diff --git a/content/child/child_discardable_shared_memory_manager.cc b/content/child/child_discardable_shared_memory_manager.cc
index 8cf113a7556b279c668514e2767c9c76d7300d83..b6dc666fa10a6a4e6a477c208d66d0401336ae53 100644
--- a/content/child/child_discardable_shared_memory_manager.cc
+++ b/content/child/child_discardable_shared_memory_manager.cc
@@ -167,8 +167,7 @@ ChildDiscardableSharedMemoryManager::AllocateLockedDiscardableMemory(
     // at least one span from the free lists.
     MemoryUsageChanged(heap_.GetSize(), heap_.GetSizeOfFreeLists());
 
-    return base::WrapUnique(
-        new DiscardableMemoryImpl(this, std::move(free_span)));
+    return base::MakeUnique<DiscardableMemoryImpl>(this, std::move(free_span));
   }
 
   // Release purged memory to free up the address space before we attempt to
@@ -210,7 +209,7 @@ ChildDiscardableSharedMemoryManager::AllocateLockedDiscardableMemory(
 
   MemoryUsageChanged(heap_.GetSize(), heap_.GetSizeOfFreeLists());
 
-  return base::WrapUnique(new DiscardableMemoryImpl(this, std::move(new_span)));
+  return base::MakeUnique<DiscardableMemoryImpl>(this, std::move(new_span));
 }
 
 bool ChildDiscardableSharedMemoryManager::OnMemoryDump(