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

base/test/test_discardable_memory_allocator.cc

Index: base/test/test_discardable_memory_allocator.cc
diff --git a/base/test/test_discardable_memory_allocator.cc b/base/test/test_discardable_memory_allocator.cc
index cd96149aefdc4d0de8c63b2d3fe7499a7efd34b3..e4d361e8999fbbf732b4c5a7338939b5b87f5295 100644
--- a/base/test/test_discardable_memory_allocator.cc
+++ b/base/test/test_discardable_memory_allocator.cc
@@ -61,7 +61,7 @@ TestDiscardableMemoryAllocator::~TestDiscardableMemoryAllocator() {
 
 std::unique_ptr<DiscardableMemory>
 TestDiscardableMemoryAllocator::AllocateLockedDiscardableMemory(size_t size) {
-  return WrapUnique(new DiscardableMemoryImpl(size));
+  return MakeUnique<DiscardableMemoryImpl>(size);
 }
 
 }  // namespace base