[Android] Introduce a Java wrapper for TemplateUrlService.

chrome/browser/search_engines/template_url_service_android.h

+// Copyright (c) 2013 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 CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_ANDROID_H_
+#define CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_ANDROID_H_
+
+#include "base/android/jni_helper.h"
+#include "base/android/scoped_java_ref.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+
+class TemplateURLService;
+
+
+// Android wrapper of the TemplateUrlService which provides access from the Java
+// layer. Note that on Android, there's only a single profile, and therefore
+// a single instance of this wrapper.
+class TemplateUrlServiceAndroid : public content::NotificationObserver {
+ public:
+  TemplateUrlServiceAndroid(JNIEnv* env, jobject obj);
+
+  void Load(JNIEnv* env, jobject obj);
+  void SetDefaultSearchProvider(JNIEnv* env, jobject obj, jint selected_index);
+  jint GetDefaultSearchProvider(JNIEnv* env, jobject obj);
+  jint GetPrepopulatedTemplateUrlCount(JNIEnv* env, jobject obj);
+  jboolean IsLoaded(JNIEnv* env, jobject obj);
+  base::android::ScopedJavaLocalRef<jobject>
+      GetPrepopulatedTemplateUrlAt(JNIEnv* env, jobject obj, jint index);
+
+  // NotificationObserver:
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+  static bool Register(JNIEnv* env);
+
+ private:
+  virtual ~TemplateUrlServiceAndroid();
+
+  JavaObjectWeakGlobalRef weak_java_obj_;
+  content::NotificationRegistrar registrar_;
+
+  // Pointer to the TemplateUrlService for the main profile.
+  TemplateURLService* template_url_service_;
+
+  DISALLOW_COPY_AND_ASSIGN(TemplateUrlServiceAndroid);
+};
+
+#endif  // CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_ANDROID_H_