Add a function that scrubs URL queries from strings.

In some cases, URL queries contain auth information. For cases where error
strings are passed from other libraries, such as from gstreamer, add a utility
function, ScrubUrlQueries, to strip queries from URLs in strings.

src/core/utilities.cpp

@@ -760,6 +760,13 @@ QByteArray GetUriForGstreamer(const QUrl& url) {
   return url.toEncoded();
 }
 
+QString ScrubUrlQueries(const QString& str) {
+  // If the URL isn't followed by whitespace, this will eat extra characters.
+  QRegExp rx("((?:http|https)://\\S*\\?)\\S*");
+  // QString::replace is non const, so operate on a copy.
+  return QString(str).replace(rx, "\\1 (query removed)");
+}
+
 }  // namespace Utilities
 
 ScopedWCharArray::ScopedWCharArray(const QString& str)

src/core/utilities.h

@@ -164,6 +164,9 @@ int GetThreadId();
 bool IsLaptop();
 
 QString SystemLanguageName();
+
+// Scrub messages for to remove queries, which may include auth info, from URLs.
+QString ScrubUrlQueries(const QString& str);
 }  // namespace Utilities
 
 class ScopedWCharArray {