PreParser build fix

src/preparser-api.cc

Index: src/preparser-api.cc
diff --git a/src/preparser-api.cc b/src/preparser-api.cc
index 111a8b738e852e6f4626d31481d9d0261a7f3f77..5bdb917bb2449177ca33da2bfcd0e978f5272bee 100644
--- a/src/preparser-api.cc
+++ b/src/preparser-api.cc
@@ -192,7 +192,7 @@ UnicodeInputStream::~UnicodeInputStream() { }
 PreParserData Preparse(UnicodeInputStream* input, size_t max_stack) {
   internal::InputStreamUTF16Buffer buffer(input);
   uintptr_t stack_limit = reinterpret_cast<uintptr_t>(&buffer) - max_stack;
-  ScannerConstants scanner_constants;
+  v8::internal::ScannerConstants scanner_constants;
   internal::StandAloneJavaScriptScanner scanner(&scanner_constants);
   scanner.Initialize(&buffer);
   internal::CompleteParserRecorder recorder;