Make JS app.setTimeOut() work again.

testing/test_support.cpp

Index: testing/test_support.cpp
diff --git a/testing/test_support.cpp b/testing/test_support.cpp
index 611ba5d580641df8c5a64c31c273ab83e630a0a9..49232990bc36fc34e3bb4f051b0368d131074b3a 100644
--- a/testing/test_support.cpp
+++ b/testing/test_support.cpp
@@ -98,6 +98,22 @@ char* GetFileContents(const char* filename, size_t* retlen) {
   return buffer;
 }
 
+std::wstring GetWideString(FPDF_WIDESTRING wstr) {
+  if (!wstr)
+    return nullptr;
+
+  size_t characters = 0;
+  while (wstr[characters])
+    ++characters;
+
+  std::wstring platform_string(characters, L'\0');
+  for (size_t i = 0; i < characters + 1; ++i) {
+    const unsigned char* ptr = reinterpret_cast<const unsigned char*>(&wstr[i]);
+    platform_string[i] = ptr[0] + 256 * ptr[1];
+  }
+  return platform_string;
+}
+
 #ifdef PDF_ENABLE_V8
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
 bool InitializeV8ForPDFium(const std::string& exe_path,