Move the remaining NTP realted files to c/b/android/ntp subdir.

chrome/browser/android/ntp_snippets_launcher.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_LAUNCHER_H_
-#define CHROME_BROWSER_ANDROID_NTP_SNIPPETS_LAUNCHER_H_
-
-#include "base/android/jni_android.h"
-#include "base/lazy_instance.h"
-#include "base/macros.h"
-#include "components/ntp_snippets/ntp_snippets_scheduler.h"
-
-// Android implementation of ntp_snippets::NTPSnippetsScheduler.
-// The NTPSnippetsLauncher singleton owns the Java SnippetsLauncher object, and
-// is used to schedule the fetching of snippets. Runs on the UI thread.
-class NTPSnippetsLauncher : public ntp_snippets::NTPSnippetsScheduler {
- public:
-  static NTPSnippetsLauncher* Get();
-
-  static bool Register(JNIEnv* env);
-
-  // ntp_snippets::NTPSnippetsScheduler implementation.
-  bool Schedule(int period_seconds) override;
-  bool Unschedule() override;
-
- private:
-  friend struct base::DefaultLazyInstanceTraits<NTPSnippetsLauncher>;
-
-  // Constructor and destructor marked private to enforce singleton.
-  NTPSnippetsLauncher();
-  virtual ~NTPSnippetsLauncher();
-
-  base::android::ScopedJavaGlobalRef<jobject> java_launcher_;
-
-  DISALLOW_COPY_AND_ASSIGN(NTPSnippetsLauncher);
-};
-
-#endif  // CHROME_BROWSER_ANDROID_NTP_SNIPPETS_LAUNCHER_H_