Sync preparser and parser wrt syntax error in switch..case.

R=jkummerow@chromium.org
BUG=v8:2210
TEST=test-parsing/ParserSync

Review URL: https://chromiumcodereview.appspot.com/10701116

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12036 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/preparser.cc

@@ -602,14 +602,17 @@ PreParser::Statement PreParser::ParseSwitchStatement(bool* ok) {
     if (token == i::Token::CASE) {
       Expect(i::Token::CASE, CHECK_OK);
       ParseExpression(true, CHECK_OK);
-      Expect(i::Token::COLON, CHECK_OK);
-    } else if (token == i::Token::DEFAULT) {
-      Expect(i::Token::DEFAULT, CHECK_OK);
-      Expect(i::Token::COLON, CHECK_OK);
     } else {
-      ParseStatement(CHECK_OK);
+      Expect(i::Token::DEFAULT, CHECK_OK);
     }
+    Expect(i::Token::COLON, CHECK_OK);
     token = peek();
+    while (token != i::Token::CASE &&
+           token != i::Token::DEFAULT &&
+           token != i::Token::RBRACE) {
+      ParseStatement(CHECK_OK);
+      token = peek();
+    }
   }
   Expect(i::Token::RBRACE, ok);
   return Statement::Default();

test/cctest/test-parsing.cc

@@ -1147,6 +1147,7 @@ TEST(ParserSync) {
     { "with ({})", "" },
     { "switch (12) { case 12: ", "}" },
     { "switch (12) { default: ", "}" },
+    { "switch (12) { ", "case 12: }" },
     { "label2: ", "" },
     { NULL, NULL }
   };