Revert "Removed support deprecated (//@|/*@) source(URL|MappingURL)="

src/parsing/scanner.cc

Index: src/parsing/scanner.cc
diff --git a/src/parsing/scanner.cc b/src/parsing/scanner.cc
index 5e34c2e018d57182db8a28434b10024ac3dca279..2d5a57958336ef1ec4bb65b8ce63da1efc199a3e 100644
--- a/src/parsing/scanner.cc
+++ b/src/parsing/scanner.cc
@@ -357,7 +357,7 @@ Token::Value Scanner::SkipSourceURLComment() {
 
 
 void Scanner::TryToParseSourceURLComment() {
-  // Magic comments are of the form: //[#]\s<name>=\s*<value>\s*.* and this
+  // Magic comments are of the form: //[#@]\s<name>=\s*<value>\s*.* and this
   // function will just return if it cannot parse a magic comment.
   if (c0_ < 0 || !unicode_cache_->IsWhiteSpace(c0_)) return;
   Advance();
@@ -578,7 +578,7 @@ void Scanner::Scan() {
         Advance();
         if (c0_ == '/') {
           Advance();
-          if (c0_ == '#') {
+          if (c0_ == '#' || c0_ == '@') {
             Advance();
             token = SkipSourceURLComment();
           } else {