Separate SwipeRefreshHandler and ContentViewCore

chrome/browser/android/swipe_refresh_handler.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_SWIPE_REFRESH_HANDLER_H_
+#define CHROME_BROWSER_ANDROID_SWIPE_REFRESH_HANDLER_H_
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_weak_ref.h"
+#include "ui/android/overscroll_refresh.h"
+
+class SwipeRefreshHandler : public ui::OverscrollRefreshHandler {
+ public:
+  SwipeRefreshHandler(JNIEnv* env, const base::android::JavaRef<jobject>& obj);
+
+  bool PullStart() override;
+  void PullUpdate(float delta) override;
+  void PullRelease(bool allow_refresh) override;
+  void PullReset() override;
+
+  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+
+  // Register the SwipeRefreshHandler's native methods through JNI.
+  static bool RegisterSwipeRefreshHandler(JNIEnv* env);
+
+ private:
+  // A weak reference to the Java SwipeRefreshHandler object.
+  JavaObjectWeakGlobalRef java_ref_;
+
+  DISALLOW_COPY_AND_ASSIGN(SwipeRefreshHandler);
+};
+
+#endif  // CHROME_BROWSER_ANDROID_SWIPE_REFRESH_HANDLER_H_