Port some of the base system to FreeBSD. Extracted from...

base/native_library.h

 // Copyright (c) 2009 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_NATIVE_LIBRARY_H_
 #define BASE_NATIVE_LIBRARY_H_
 
 // This file defines a cross-platform "NativeLibrary" type which represents
 // a loadable module.
 
@@ skipping 26 matching lines @@
   DYNAMIC_LIB
 };
 struct NativeLibraryStruct {
   NativeLibraryType type;
   union {
     CFBundleRef bundle;
     void* dylib;
   };
 };
 typedef NativeLibraryStruct* NativeLibrary;
-#elif defined(OS_LINUX)
+#elif defined(OS_LINUX) || defined(OS_FREEBSD)
 typedef void* NativeLibrary;
 #endif  // OS_*
 
 // Loads a native library from disk.  Release it with UnloadNativeLibrary when
 // you're done.
 NativeLibrary LoadNativeLibrary(const FilePath& library_path);
 
 // Unloads a native library.
 void UnloadNativeLibrary(NativeLibrary library);
 
 // Gets a function pointer from a native library.
 void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
                                           const char* name);
 
 // Returns the full platform specific name for a native library.
 // For example:
 // "mylib" returns "mylib.dll" on Windows, "libmylib.so" on Linux,
 // "mylib.dylib" on Mac.
 string16 GetNativeLibraryName(const string16& name);
 
 }  // namespace base
 
 #endif  // BASE_NATIVE_LIBRARY_H_