[PresentationAPI, Android] Add ChromeMediaRouter.java and bind it with the native MediaRouterAndroid

chrome/browser/media/android/router/media_router_android.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/media/android/router/media_router_android.h"
 
+#include "base/android/jni_android.h"
 #include "base/logging.h"
+#include "jni/ChromeMediaRouter_jni.h"
 
 namespace media_router {
 
 MediaRouterAndroid::MediaRouterAndroid(content::BrowserContext*) {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  java_media_router_.Reset(Java_ChromeMediaRouter_create(
+      env,
+      reinterpret_cast<jlong>(this),
+      base::android::GetApplicationContext()));
 }
 
 MediaRouterAndroid::~MediaRouterAndroid() {
 }
 
+// static
+bool MediaRouterAndroid::Register(JNIEnv* env) {
+  bool ret = RegisterNativesImpl(env);
+  // No native calls to register just yet.
+  // DCHECK(g_ChromeMediaRouter_clazz);
+  return ret;
+}
+
 void MediaRouterAndroid::CreateRoute(
     const MediaSource::Id& source_id,
     const MediaSink::Id& sink_id,
     const GURL& origin,
     int tab_id,
     const std::vector<MediaRouteResponseCallback>& callbacks) {
   NOTIMPLEMENTED();
 }
 void MediaRouterAndroid::JoinRoute(
     const MediaSource::Id& source,
@@ skipping 46 matching lines @@
 void MediaRouterAndroid::RegisterPresentationSessionMessagesObserver(
     PresentationSessionMessagesObserver* observer) {
   NOTIMPLEMENTED();
 }
 void MediaRouterAndroid::UnregisterPresentationSessionMessagesObserver(
     PresentationSessionMessagesObserver* observer) {
   NOTIMPLEMENTED();
 }
 
 }  // namespace media_router