Introduce ThreadedInputConnection behind a switch

content/public/android/java/src/org/chromium/content/browser/input/ChromiumBaseInputConnection.java

Index: content/public/android/java/src/org/chromium/content/browser/input/ChromiumBaseInputConnection.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/input/ChromiumBaseInputConnection.java b/content/public/android/java/src/org/chromium/content/browser/input/ChromiumBaseInputConnection.java
new file mode 100644
index 0000000000000000000000000000000000000000..9cef882282f72f4372df456f5a4229a9303784d1
--- /dev/null
+++ b/content/public/android/java/src/org/chromium/content/browser/input/ChromiumBaseInputConnection.java
@@ -0,0 +1,35 @@
+// 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.input;
+
+import android.view.inputmethod.InputConnection;
+
+/**
+ * TODO: Insert description here. (generated by changwan)
+ */
+public interface ChromiumBaseInputConnection extends InputConnection {
+    /**
+     * Updates the internal representation of the text being edited and its selection and
+     * composition properties.
+     *
+     * @param text The String contents of the field being edited.
+     * @param selectionStart The character offset of the selection start, or the caret position if
+     *                       there is no selection.
+     * @param selectionEnd The character offset of the selection end, or the caret position if there
+     *                     is no selection.
+     * @param compositionStart The character offset of the composition start, or -1 if there is no
+     *                         composition.
+     * @param compositionEnd The character offset of the composition end, or -1 if there is no
+     *                       selection.
+     * @param isNonImeChange True when the update was caused by non-IME (e.g. Javascript).
+     */
+    void updateState(String text, int selectionStart, int selectionEnd, int compositionStart,
+            int compositionEnd, boolean isNonImeChange);
+
+    /**
+     *
+     */
+    void restartInput();
+}