Add a macro for SharedMemory::Share

base/memory/shared_memory.h

 // Copyright (c) 2012 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.
 
 #ifndef BASE_MEMORY_SHARED_MEMORY_H_
 #define BASE_MEMORY_SHARED_MEMORY_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 248 matching lines @@
 #if defined(OS_POSIX) && !defined(OS_NACL) && !defined(OS_ANDROID) && \
     !(defined(OS_MACOSX) && !defined(OS_IOS))
   bool FilePathForMemoryName(const std::string& mem_name, FilePath* path);
 #endif
 
   enum ShareMode {
     SHARE_READONLY,
     SHARE_CURRENT_MODE,
   };
 
+#if defined(OS_MACOSX)
   bool Share(SharedMemoryHandle* new_handle, ShareMode share_mode);
+#endif
 
   bool ShareToProcessCommon(ProcessHandle process,
                             SharedMemoryHandle* new_handle,
                             bool close_self,
                             ShareMode);
 
 #if defined(OS_WIN)
   // If true indicates this came from an external source so needs extra checks
   // before being mapped.
   bool external_section_;
@@ skipping 15 matching lines @@
   size_t             mapped_size_;
   void*              memory_;
   bool               read_only_;
   size_t             requested_size_;
 
   DISALLOW_COPY_AND_ASSIGN(SharedMemory);
 };
 }  // namespace base
 
 #endif  // BASE_MEMORY_SHARED_MEMORY_H_