Move the android library loader from content to base

base/android/library_loader/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 BASE_ANDROID_LIBRARY_LOADER_HOOKS_H_
+#define BASE_ANDROID_LIBRARY_LOADER_HOOKS_H_
+
+#include <jni.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 content
+// specific callbacks.  Any application specific JNI bindings should happen
+// once the native library has fully loaded.
+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 LibraryLoaderHook(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.
+
+void SetLibraryLoadedHook(LibraryLoaderHook* func);
+
+// Pass the version name to Content. 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.
+void SetVersionNumber(const char* version_number);
+
+// Call on exit to delete the AtExitManager which OnLibraryLoadedOnUIThread
+// created.
+void LibraryLoaderExitHook();
+
+}  // namespace android
+}  // namespace base
+
+#endif  // BASE_ANDROID_LIBRARY_LOADER_HOOKS_H_