1 files changed, 7 insertions, 2 deletions
diff --git a/JavaScriptCore/wtf/text/StringImpl.cpp b/JavaScriptCore/wtf/text/StringImpl.cpp
index 1c4de66..c83ec42 100644
--- a/JavaScriptCore/wtf/text/StringImpl.cpp
+++ b/JavaScriptCore/wtf/text/StringImpl.cpp
@@ -270,12 +270,17 @@ PassRefPtr<StringImpl> StringImpl::upper()
     return newImpl.release();
 }
 
-PassRefPtr<StringImpl> StringImpl::secure(UChar character)
+PassRefPtr<StringImpl> StringImpl::secure(UChar character, LastCharacterBehavior behavior)
 {
+    if (!m_length)
+        return this;
+
     UChar* data;
     RefPtr<StringImpl> newImpl = createUninitialized(m_length, data);
-    for (unsigned i = 0; i < m_length; ++i)
+    unsigned lastCharacterIndex = m_length - 1;
+    for (unsigned i = 0; i < lastCharacterIndex; ++i)
         data[i] = character;
+    data[lastCharacterIndex] = (behavior == ObscureLastCharacter) ? character : m_data[lastCharacterIndex];
     return newImpl.release();
 }