Move PathExists to base namespace.

base/base_paths_mac.mm

 // 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.
 
 // Defines base::PathProviderMac which replaces base::PathProviderPosix for Mac
 // in base/path_service.cc.
 
 #include <dlfcn.h>
 #import <Foundation/Foundation.h>
 #include <mach-o/dyld.h>
@@ skipping 47 matching lines @@
       GetNSExecutablePath(result);
       return true;
     case base::FILE_MODULE:
       return GetModulePathForAddress(result,
           reinterpret_cast<const void*>(&base::PathProviderMac));
     case base::DIR_APP_DATA: {
       bool success = base::mac::GetUserDirectory(NSApplicationSupportDirectory,
                                                  result);
 #if defined(OS_IOS)
       // On IOS, this directory does not exist unless it is created explicitly.
-      if (success && !file_util::PathExists(*result))
+      if (success && !base::PathExists(*result))
         success = file_util::CreateDirectory(*result);
 #endif  // defined(OS_IOS)
       return success;
     }
     case base::DIR_SOURCE_ROOT:
       // Go through PathService to catch overrides.
       if (!PathService::Get(base::FILE_EXE, result))
         return false;
 
       // Start with the executable's directory.
@@ skipping 24 matching lines @@
       return base::mac::GetUserDirectory(NSCachesDirectory, result);
     case base::DIR_HOME:
       *result = base::mac::NSStringToFilePath(NSHomeDirectory());
       return true;
     default:
       return false;
   }
 }
 
 }  // namespace base