Fetch snippets from ChromeReader and show them on the NTP

chrome/browser/android/ntp_snippets_bridge.h

+// Copyright 2016 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_ANDROID_NTP_SNIPPETS_BRIDGE_H_
+#define CHROME_BROWSER_ANDROID_NTP_SNIPPETS_BRIDGE_H_
+
+#include <jni.h>
+
+#include "base/android/scoped_java_ref.h"
+#include "base/scoped_observer.h"
+#include "components/ntp_snippets/ntp_snippets_service.h"
+
+// The C++ counterpart to NTPSnippetsBridge.java. Enables Java code to access
+// the list of snippets to show on the NTP
+class NTPSnippetsBridge : public ntp_snippets::NTPSnippetsServiceObserver {
+ public:
+  explicit NTPSnippetsBridge(JNIEnv* env,
+                             jobject j_profile,
+                             jobject j_observer);
+  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+
+  static bool Register(JNIEnv* env);
+
+ private:
+  ~NTPSnippetsBridge() override;
+
+  // NTPSnippetsServiceObserver overrides
+  void NTPSnippetsServiceLoaded(
+      ntp_snippets::NTPSnippetsService* service) override;
+  void NTPSnippetsServiceShutdown(
+      ntp_snippets::NTPSnippetsService* service) override;
+
+  ntp_snippets::NTPSnippetsService* ntp_snippets_service_;
+
+  base::android::ScopedJavaGlobalRef<jobject> observer_;
+  ScopedObserver<ntp_snippets::NTPSnippetsService,
+                 ntp_snippets::NTPSnippetsServiceObserver>
+      snippet_service_observer_;
+
+  DISALLOW_COPY_AND_ASSIGN(NTPSnippetsBridge);
+};
+
+#endif  // CHROME_BROWSER_ANDROID_NTP_SNIPPETS_BRIDGE_H_