Check library version and handle library load errors

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 {
 
 // 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.
 CONTENT_EXPORT bool RegisterLibraryLoaderEntryHook(JNIEnv* env);
 
 // Register all content JNI functions now, rather than waiting for the process
 // of fully loading the native library to complete.  This must only be called
 // during JNI_OnLoad.
 CONTENT_EXPORT bool EnsureJniRegistered(JNIEnv* env);
 
+// 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.
+CONTENT_EXPORT void SetVersionNumber(const char* version_number);
+
 // Call on exit to delete the AtExitManager which OnLibraryLoadedOnUIThread
 // created.
 CONTENT_EXPORT void LibraryLoaderExitHook();
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_APP_ANDROID_LIBRARY_LOADER_HOOKS_H_