Remove android_library_loader_hook from content API

content/public/app/android_library_loader_hooks.h

-// 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.
-
-#ifndef CONTENT_PUBLIC_APP_ANDROID_LIBRARY_LOADER_HOOKS_H_
-#define CONTENT_PUBLIC_APP_ANDROID_LIBRARY_LOADER_HOOKS_H_
-
-#include <jni.h>
-
-#include "base/basictypes.h"
-#include "content/common/content_export.h"
-
-namespace content {
-
-// Register all content JNI functions now, rather than waiting for the process
-// of fully loading the native library to complete.
-CONTENT_EXPORT bool EnsureJniRegistered(JNIEnv* env);
-
-// Do the intialization of content needed immediately after the native library
-// has loaded.
-// This is designed to be used as a hook function to be passed to
-// base::android::SetLibraryLoadedHook
-CONTENT_EXPORT bool LibraryLoaded(JNIEnv* env,
-                                  jclass clazz);
-
-}  // namespace content
-
-#endif  // CONTENT_PUBLIC_APP_ANDROID_LIBRARY_LOADER_HOOKS_H_