MIPS: Workaround for bug in MIPS Android compiler

src/heap/store-buffer.h

 // Copyright 2011 the V8 project 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 V8_STORE_BUFFER_H_
 #define V8_STORE_BUFFER_H_
 
 #include "src/allocation.h"
 #include "src/base/logging.h"
 #include "src/base/platform/platform.h"
@@ skipping 184 matching lines @@
   // We only want to have at most one concurrent processing tas running.
   bool task_running_;
 
   // Points to the current buffer in use.
   int current_;
 
   base::VirtualMemory* virtual_memory_;
 
   // Callbacks are more efficient than reading out the gc state for every
   // store buffer operation.
-  std::function<void(StoreBuffer*, Address)> insertion_callback;
-  std::function<void(StoreBuffer*, Address, Address)> deletion_callback;
+  void (*insertion_callback)(StoreBuffer*, Address);
+  void (*deletion_callback)(StoreBuffer*, Address, Address);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_STORE_BUFFER_H_