Add support to Document::URL property getter.

fpdfsdk/javascript/Document.cpp

Index: fpdfsdk/javascript/Document.cpp
diff --git a/fpdfsdk/javascript/Document.cpp b/fpdfsdk/javascript/Document.cpp
index 9c680de906471063a4a7e7ddf9250cb38022d985..161a5d09e97d31b522e8c3fca38b86a86d9f6da3 100644
--- a/fpdfsdk/javascript/Document.cpp
+++ b/fpdfsdk/javascript/Document.cpp
@@ -91,6 +91,7 @@ JS_STATIC_PROP_ENTRY(path)
 JS_STATIC_PROP_ENTRY(producer)
 JS_STATIC_PROP_ENTRY(subject)
 JS_STATIC_PROP_ENTRY(title)
+JS_STATIC_PROP_ENTRY(URL)
 JS_STATIC_PROP_ENTRY(zoom)
 JS_STATIC_PROP_ENTRY(zoomType)
 END_JS_STATIC_PROP()
@@ -904,6 +905,18 @@ FX_BOOL Document::mouseY(IJS_Context* cc,
   return TRUE;
 }
 
+FX_BOOL Document::URL(IJS_Context* cc,
+                      CJS_PropValue& vp,
+                      CFX_WideString& sError) {
+  if (vp.IsSetting()) {
+    CJS_Context* pContext = static_cast<CJS_Context*>(cc);
+    sError = JSGetStringFromID(pContext, IDS_STRING_JSREADONLY);
+    return FALSE;
+  }
+  vp << m_pDocument->GetPath();
+  return TRUE;
+}
+
 FX_BOOL Document::baseURL(IJS_Context* cc,
                           CJS_PropValue& vp,
                           CFX_WideString& sError) {