Rename 'harddisk' to 'fixed' for storage unit type

chrome/browser/extensions/api/system_info_storage/storage_info_provider_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 "chrome/browser/extensions/api/system_info_storage/storage_info_provider.h"
 
 #include <CoreFoundation/CoreFoundation.h>
 #include <IOKit/IOBSD.h>
 #include <IOKit/IOKitLib.h>
 #include <IOKit/storage/IOMedia.h>
@@ skipping 111 matching lines @@
     base::mac::ScopedCFTypeRef<CFTypeRef> removable_cf(
         IORegistryEntryCreateCFProperty(media,
                                         CFSTR(kIOMediaEjectableKey),
                                         kCFAllocatorDefault,
                                         0));
     if (!removable_cf)
       dev_path_to_type_map_[dev_path] = systeminfo::kStorageTypeUnknown;
     else if (CFBooleanGetValue(base::mac::CFCast<CFBooleanRef>(removable_cf)))
       dev_path_to_type_map_[dev_path] = systeminfo::kStorageTypeRemovable;
     else
-      dev_path_to_type_map_[dev_path] =  systeminfo::kStorageTypeHardDisk;
+      dev_path_to_type_map_[dev_path] =  systeminfo::kStorageTypeFixed;
   }
 }
 
 }  // namespace
 
 // static
 StorageInfoProvider* StorageInfoProvider::Get() {
   return StorageInfoProvider::GetInstance<StorageInfoProviderMac>();
 }
 
 }  // namespace extensions