Introduce ThreadedInputConnection behind a switch

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

 // Copyright 2013 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.annotation.TargetApi;
 import android.content.Context;
 import android.os.Build;
 import android.os.IBinder;
 import android.os.ResultReceiver;
 import android.view.View;
 import android.view.inputmethod.CursorAnchorInfo;
 import android.view.inputmethod.InputMethodManager;
 
 import org.chromium.base.Log;
 
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
 /**
  * Wrapper around Android's InputMethodManager
  */
 public class InputMethodManagerWrapper {
     private static final String TAG = "cr_Ime";
 
     private final Context mContext;
 
     public InputMethodManagerWrapper(Context context) {
         Log.d(TAG, "Constructor");
@@ skipping 53 matching lines @@
      * @see android.view.inputmethod.InputMethodManager#updateCursorAnchorInfo(View,
      * CursorAnchorInfo)
      */
     @TargetApi(Build.VERSION_CODES.LOLLIPOP)
     public void updateCursorAnchorInfo(View view, CursorAnchorInfo cursorAnchorInfo) {
         Log.d(TAG, "updateCursorAnchorInfo");
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
             getInputMethodManager().updateCursorAnchorInfo(view, cursorAnchorInfo);
         }
     }
+
+    /**
+     * Notify that a user took some action with the current input method. Without this call
+     * an input method app may wait longer when the user switches methods within the app.
+     */
+    public void notifyUserAction() {
+        // On N and above, this is not needed.
+        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.M) return;
+        Log.d(TAG, "notifyUserAction");
+        InputMethodManager manager = getInputMethodManager();
+        try {
+            Method method = InputMethodManager.class.getMethod("notifyUserAction");
+            method.invoke(manager);
+        } catch (NoSuchMethodException | IllegalAccessException | IllegalArgumentException
+                | InvocationTargetException e) {
+            Log.d(TAG, "notifyUserAction failed");
+            return;
+        }
+    }
 }