[Payments] Add UI elements to secure branding for payments

components/url_formatter/android/java/src/org/chromium/components/url_formatter/UrlFormatter.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.components.url_formatter;
 
+import android.text.Spannable;
+import android.text.SpannableString;
 import android.text.TextUtils;
+import android.text.style.ForegroundColorSpan;
 
 import org.chromium.base.annotations.JNINamespace;
 
 import java.net.URI;
 
 /**
  * Wrapper for utilities in url_formatter.
  */
 @JNINamespace("url_formatter::android")
 public final class UrlFormatter {
@@ skipping 58 matching lines @@
      *         it fails to parse it.
      */
     public static String formatUrlForSecurityDisplay(String uri, boolean showScheme) {
         if (showScheme) {
             return nativeFormatUrlForSecurityDisplay(uri);
         } else {
             return nativeFormatUrlForSecurityDisplayOmitScheme(uri);
         }
     }
 
+    /**
+     * Tints the scheme of the URL to specific color for display.
+     *
+     * @param uri The URI.

[please use gerrit instead, 2017/02/15 21:45:02]

Please align "The" together on these two lines.

[gogerald1, 2017/02/16 16:43:14]

Done.

+     * @param color The color used to tint the scheme.
+     *
+     * @return The URL with tinted scheme.
+     */
+    public static CharSequence tintUrlSchemeForSecurityDisplay(String uri, int color) {

[please use gerrit instead, 2017/02/15 21:45:02]

How does the omnibox tint the URL scheme? It would be great to call into their
function instead of constructing our own.

[please use gerrit instead, 2017/02/15 21:45:02]

Please pick either URL or URI and use that term throughout your patch.

[gogerald1, 2017/02/16 16:43:14]

Done.

[gogerald1, 2017/02/16 16:43:14]

They do the similar thing. 

+        SpannableString spannableUri = new SpannableString(uri);
+        spannableUri.setSpan(new ForegroundColorSpan(color), 0,
+                spannableUri.toString().indexOf(":"), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

[please use gerrit instead, 2017/02/15 21:45:02]

Please tint only "https:" scheme. Although "file:" and "http://localhost" URLs
allow usage of PaymentRequest for developers, these should not be tinted. IMHO.

[gogerald1, 2017/02/16 16:43:14]

Done.

+        return spannableUri;
+    }
+
     private static native String nativeFixupUrl(String url);
     private static native String nativeFormatUrlForDisplay(String url);
     private static native String nativeFormatUrlForSecurityDisplay(String url);
     private static native String nativeFormatUrlForSecurityDisplayOmitScheme(String url);
 }