WebUsb Android chooser UI

ui/android/java/src/org/chromium/ui/text/NoUnderlineClickableSpan.java

+// 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.
+
+package org.chromium.ui.text;
+
+import android.graphics.Color;
+import android.text.TextPaint;
+import android.text.style.ClickableSpan;
+import android.view.View;
+
+/**
+* Show a clickable link with underlines turned off.
+*/
+public class NoUnderlineClickableSpan extends ClickableSpan {
+    @Override
+    public void onClick(View view) {
+        // Get rid of the highlight background on selection.
+        view.invalidate();
+    }
+
+    // Disable underline on the link text.
+    @Override
+    public void updateDrawState(TextPaint textPaint) {
+        super.updateDrawState(textPaint);
+        textPaint.bgColor = Color.TRANSPARENT;
+        textPaint.setUnderlineText(false);
+    }
+}