Move part of scanner.* into scanner-base.* for reuse in preparser scanner.

test/cctest/test-parsing.cc

Index: test/cctest/test-parsing.cc
diff --git a/test/cctest/test-parsing.cc b/test/cctest/test-parsing.cc
index cdf1c7b908e5b7ecaa3ca2f5b0a1070c6b5dbfed..7ae8dcfa386d038b929306129e1df66c7ff17eef 100755
--- a/test/cctest/test-parsing.cc
+++ b/test/cctest/test-parsing.cc
@@ -263,7 +263,7 @@ TEST(StandAlonePreParser) {
     i::CompleteParserRecorder log;
     i::Scanner scanner;
     scanner.Initialize(i::Handle<i::String>::null(), &stream, i::JAVASCRIPT);
-    i::preparser::PreParser<i::Scanner, i::CompleteParserRecorder> preparser;
+    v8::preparser::PreParser<i::Scanner, i::CompleteParserRecorder> preparser;
     bool result = preparser.PreParseProgram(&scanner, &log, true);
     CHECK(result);
     i::ScriptDataImpl data(log.ExtractData());