plugins: move NativeLibrary into base.

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.  It's used for holding plugin handles.

[jam, 2009/04/21 00:26:53]

no need to mention plugins here

+
+#include "build/build_config.h"
+
+#if defined(OS_WIN)
+#include <windows.h>
+#elif defined(OS_MACOSX)
+#import <Carbon/Carbon.h>
+#endif  // OS_*
+
+class FilePath;
+
+namespace base {
+
+#if defined(OS_WIN)
+typedef HMODULE NativeLibrary;
+typedef char* NativeLibraryFunctionNameType;
+#elif defined(OS_MACOSX)
+typedef CFBundleRef NativeLibrary;
+typedef CFStringRef NativeLibraryFunctionNameType;
+#elif defined(OS_LINUX)
+typedef void* NativeLibrary;
+typedef const char* NativeLibraryFunctionNameType;
+#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,
+                                          NativeLibraryFunctionNameType name);
+
+}  // namespace base
+
+#endif  // BASE_NATIVE_LIBRARY_H_