[Android] Use the platform SwipeRefreshLayout

content/public/android/java/src/org/chromium/content/browser/OverscrollRefreshHandler.java

Index: content/public/android/java/src/org/chromium/content/browser/OverscrollRefreshHandler.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/OverscrollRefreshHandler.java b/content/public/android/java/src/org/chromium/content/browser/OverscrollRefreshHandler.java
new file mode 100644
index 0000000000000000000000000000000000000000..8717b8384fe5ee05835cea8ff01d438a89c7dc8c
--- /dev/null
+++ b/content/public/android/java/src/org/chromium/content/browser/OverscrollRefreshHandler.java
@@ -0,0 +1,40 @@
+// 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.
+
+package org.chromium.content.browser;
+
+/**
+ * Simple interface allowing customized response to an overscrolling pull input.
+ */
+public interface OverscrollRefreshHandler {
+    /**
+     * Signals the start of an overscrolling pull.
+     * @return Whether the handler will consume the overscroll sequence.
+     */
+    public boolean start();
+
+    /**
+     * Signals a pull update.
+     * @param delta The change in pull distance (positive if pulling down, negative if up).
+     */
+    public void pull(float delta);
+
+    /**
+     * Signals the release of the pull.
+     * @param allowRefresh Whether the release signal should be allowed to trigger a refresh.
+     */
+    public void release(boolean allowRefresh);
+
+    /**
+     * Reset the active pull state.
+     */
+    public void reset();
+
+    /**
+     * Toggle whether the effect is active.
+     * @param enabled Whether to enable the effect.
+     *                If disabled, the effect should deactive itself apropriately.
+     */
+    public void setEnabled(boolean enabled);
+}