Change SharedMemory to initialize member vars in header.

base/memory/shared_memory_mac.cc

 // 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.
 
 #include "base/memory/shared_memory.h"
 
 #include <errno.h>
 #include <mach/mach_vm.h>
 #include <stddef.h>
 #include <sys/mman.h>
@@ skipping 61 matching lines @@
       mach_task_self(), reinterpret_cast<memory_object_size_t*>(&size),
       reinterpret_cast<memory_object_offset_t>(temp_addr), VM_PROT_READ,
       &named_right, MACH_PORT_NULL);
   if (kr != KERN_SUCCESS)
     return false;
 
   *new_handle = SharedMemoryHandle(named_right, size, handle.GetGUID());
   return true;
 }
 
-
 }  // namespace
 
-SharedMemory::SharedMemory()
-    : mapped_memory_mechanism_(SharedMemoryHandle::MACH),
-      mapped_size_(0),
-      memory_(NULL),
-      read_only_(false),
-      requested_size_(0) {}
+SharedMemory::SharedMemory() {}
 
 SharedMemory::SharedMemory(const SharedMemoryHandle& handle, bool read_only)
     : mapped_memory_mechanism_(SharedMemoryHandle::POSIX),
       shm_(handle),
-      mapped_size_(0),
-      memory_(NULL),
-      read_only_(read_only),
-      requested_size_(0) {}
+      read_only_(read_only) {}
 
 SharedMemory::~SharedMemory() {
   Unmap();
   Close();
 }
 
 // static
 bool SharedMemory::IsHandleValid(const SharedMemoryHandle& handle) {
   return handle.IsValid();
 }
@@ skipping 164 matching lines @@
 
   DCHECK(shm_.IsValid());
   base::SharedMemoryHandle new_handle;
   bool success = MakeMachSharedMemoryHandleReadOnly(&new_handle, shm_, memory_);
   if (success)
     new_handle.SetOwnershipPassesToIPC(true);
   return new_handle;
 }
 
 }  // namespace base