Introduce ThreadedInputConnection behind a switch

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

+// 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.util.StringBuilderPrinter;
+import android.view.inputmethod.CorrectionInfo;
+import android.view.inputmethod.EditorInfo;
+
+import org.chromium.base.ThreadUtils;
+
+/**
+ * Utilities for IME-related classes.
+ */
+public class ImeUtils {
+    /**
+     * Dump the given {@EditorInfo} into class.
+     * @param editorInfo
+     * @return User-readable {@EditorInfo}.
+     */
+    static String dumpEditorInfo(EditorInfo editorInfo) {
+        StringBuilder builder = new StringBuilder();
+        StringBuilderPrinter printer = new StringBuilderPrinter(builder);
+        editorInfo.dump(printer, "");
+        return builder.toString();
+    }
+
+    /**
+     * Dump the given {@CorrectionInfo} into class.
+     * @param correctionInfo
+     * @return User-readable {@CorrectionInfo}.
+     */
+    static String dumpCorrectionInfo(CorrectionInfo correctionInfo) {
+        // TODO(changwan): implement it properly if needed.
+        return correctionInfo.toString();
+    }
+
+    // TODO(changwan): remove these once implementation becomes stable.
+    static void assertReally(boolean value) {
+        if (!value) {
+            throw new AssertionError();
+        }
+    }
+
+    static void assertReally(String msg, boolean value) {
+        if (!value) {
+            throw new AssertionError(msg);
+        }
+    }
+
+    static void assertNotOnUiThread() {
+        assertReally("Should not be on UI thread.", !ThreadUtils.runningOnUiThread());
+    }
+
+    static void assertOnUiThread() {
+        assertReally("Should be on UI thread.", ThreadUtils.runningOnUiThread());
+    }
+}