[Android] Chagne items shown in context menu for tel link

chrome/android/java/src/org/chromium/chrome/browser/util/UrlUtilities.java

Index: chrome/android/java/src/org/chromium/chrome/browser/util/UrlUtilities.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/util/UrlUtilities.java b/chrome/android/java/src/org/chromium/chrome/browser/util/UrlUtilities.java
index 7fee8620291a54c8b52db0d0f4457d34c5bdc022..94f376c8ad7bef623d90c57183d647b3615cfb47 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/util/UrlUtilities.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/util/UrlUtilities.java
@@ -42,6 +42,27 @@ public class UrlUtilities {
     private static final Pattern URL_SCHEME_PATTERN =
             Pattern.compile("^[a-zA-Z]+$");
 
+    private static final String TEL_SCHEME = "tel:";
+
+    /**
+     * @param uri A URI.
+     *
+     * @return True if the URI's scheme is phone number scheme.
+     */
+    public static boolean isTelScheme(String uri) {
+        return uri != null && uri.startsWith(TEL_SCHEME);
+    }
+
+    /**
+     * @param uri A URI.
+     *
+     * @return The string after tel: scheme. Normally, it should be a phone number, but isn't
+     *         guaranteed.
+     */
+    public static String getTelNumber(String uri) {
+        return uri.split(":")[1];
+    }
+
     /**
      * @param uri A URI.
      *