Remove unused Interests code.

chrome/browser/interests/android/interests_service.h

Index: chrome/browser/interests/android/interests_service.h
diff --git a/chrome/browser/interests/android/interests_service.h b/chrome/browser/interests/android/interests_service.h
deleted file mode 100644
index 888942af1b6f24f9bf96bd5ec1e752b115951114..0000000000000000000000000000000000000000
--- a/chrome/browser/interests/android/interests_service.h
+++ /dev/null
@@ -1,44 +0,0 @@
-// 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.
-
-#ifndef CHROME_BROWSER_INTERESTS_ANDROID_INTERESTS_SERVICE_H_
-#define CHROME_BROWSER_INTERESTS_ANDROID_INTERESTS_SERVICE_H_
-
-#include <jni.h>
-
-#include <memory>
-
-#include "base/android/scoped_java_ref.h"
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "chrome/browser/interests/interests_fetcher.h"
-
-class Profile;
-
-// Provides a list of user interests to Java
-class InterestsService {
- public:
-  explicit InterestsService(Profile* profile);
-  virtual ~InterestsService();
-
-  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
-  static bool Register(JNIEnv* env);
-  void GetInterests(JNIEnv* env,
-                    const base::android::JavaParamRef<jobject>& obj,
-                    const base::android::JavaParamRef<jobject>& j_callback);
-
- private:
-  void OnObtainedInterests(
-      std::unique_ptr<InterestsFetcher> fetcher,
-      const base::android::ScopedJavaGlobalRef<jobject>& j_callback,
-      std::unique_ptr<std::vector<InterestsFetcher::Interest>> interests);
-
-  Profile* profile_;
-
-  base::WeakPtrFactory<InterestsService> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(InterestsService);
-};
-
-#endif  // CHROME_BROWSER_INTERESTS_ANDROID_INTERESTS_SERVICE_H_