Use mojo for WebappRegistry.

chrome/browser/android/webapps/webapp_registry.cc

-// Copyright 2015 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.
-
-#include "chrome/browser/android/webapps/webapp_registry.h"
-
-#include <jni.h>
-
-#include "base/android/context_utils.h"
-#include "base/android/jni_android.h"
-#include "base/callback.h"
-#include "chrome/browser/io_thread.h"
-#include "content/public/browser/browser_thread.h"
-#include "jni/WebappRegistry_jni.h"
-
-void WebappRegistry::UnregisterWebapps(const base::Closure& callback) {
-  JNIEnv* env = base::android::AttachCurrentThread();
-  uintptr_t callback_pointer = reinterpret_cast<uintptr_t>(
-      new base::Closure(callback));
-
-  Java_WebappRegistry_unregisterAllWebapps(
-      env,
-      base::android::GetApplicationContext(),
-      callback_pointer);
-}
-
-void WebappRegistry::ClearWebappHistory(const base::Closure& callback) {
-  JNIEnv* env = base::android::AttachCurrentThread();
-  uintptr_t callback_pointer = reinterpret_cast<uintptr_t>(
-      new base::Closure(callback));
-
-  Java_WebappRegistry_clearWebappHistory(
-      env,
-      base::android::GetApplicationContext(),
-      callback_pointer);
-}
-
-// Callback used by Java when all web apps have been unregistered.
-void OnWebappsUnregistered(JNIEnv* env,
-                           const JavaParamRef<jclass>& clazz,
-                           jlong jcallback) {
-  base::Closure* callback = reinterpret_cast<base::Closure*>(jcallback);
-  callback->Run();
-  delete callback;
-}
-
-// Callback used by Java when all web app last used times have been cleared.
-void OnClearedWebappHistory(JNIEnv* env,
-                            const JavaParamRef<jclass>& clazz,
-                            jlong jcallback) {
-  base::Closure* callback = reinterpret_cast<base::Closure*>(jcallback);
-  callback->Run();
-  delete callback;
-}
-
-// static
-bool WebappRegistry::RegisterWebappRegistry(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}