Require SK_DECLARE_STATIC_LAZY_PTR is used in global scope.

src/lazy/SkDiscardableMemoryPool.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkDiscardableMemory.h"
 #include "SkDiscardableMemoryPool.h"
 #include "SkImageGenerator.h"
@@ skipping 242 matching lines @@
     return SkDiscardableMemoryPool::Create(SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE,
                                            &gMutex);
 }
 
 }  // namespace
 
 SkDiscardableMemoryPool* SkDiscardableMemoryPool::Create(size_t size, SkBaseMutex* mutex) {
     return SkNEW_ARGS(DiscardableMemoryPool, (size, mutex));
 }
 
+SK_DECLARE_STATIC_LAZY_PTR(SkDiscardableMemoryPool, global, create_global_pool);
+
 SkDiscardableMemoryPool* SkGetGlobalDiscardableMemoryPool() {
-    SK_DECLARE_STATIC_LAZY_PTR(SkDiscardableMemoryPool, global, create_global_pool);
     return global.get();
 }
 
 ////////////////////////////////////////////////////////////////////////////////