Move the android library loader from content to base

base/android/library_loader/library_loader_hooks.h

+// Copyright 2014 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_ANDROID_LIBRARY_LOADER_HOOKS_H_
+#define BASE_ANDROID_LIBRARY_LOADER_HOOKS_H_
+
+#include <jni.h>
+
+#include "base/base_export.h"
+
+namespace base {
+namespace android {
+
+// Registers the callbacks that allows the entry point of the library to be
+// exposed to the calling java code.  This handles only registering the
+// the callbacks needed by the loader. Any application specific JNI bindings
+// should happen once the native library has fully loaded, either in the library
+// loaded hook function or later.
+BASE_EXPORT bool RegisterLibraryLoaderEntryHook(JNIEnv* env);
+
+// Typedef for hook function to be called (indirectly from Java) once the
+// libraries are loaded. The hook function should register the JNI bindings
+// required to start the application. It should return true for success and
+// false for failure.
+// Note: this can't use base::Callback because there is no way of initializing
+// the default callback without using static objects, which we forbid.
+typedef bool LibraryLoadedHook(JNIEnv* env,
+                               jclass clazz,
+                               jobjectArray init_command_line);
+
+// Set the hook function to be called (from Java) once the libraries are loaded.
+// SetLibraryLoadedHook may only be called from JNI_OnLoad. The hook function
+// should register the JNI bindings required to start the application.
+
+BASE_EXPORT void SetLibraryLoadedHook(LibraryLoadedHook* func);
+
+// Pass the version name to the loader. This used to check that the library
+// version matches the version expected by Java before completing JNI
+// registration.
+// Note: argument must remain valid at least until library loading is complete.
+BASE_EXPORT void SetVersionNumber(const char* version_number);
+
+// Call on exit to delete the AtExitManager which OnLibraryLoadedOnUIThread
+// created.
+BASE_EXPORT void LibraryLoaderExitHook();
+
+}  // namespace android
+}  // namespace base
+
+#endif  // BASE_ANDROID_LIBRARY_LOADER_HOOKS_H_