Add quotes around strings when generating source from the token stream.

vm/object.h

Index: vm/object.h
===================================================================
--- vm/object.h	(revision 9471)
+++ vm/object.h	(working copy)
@@ -3219,6 +3219,8 @@
                    intptr_t src_offset,
                    intptr_t len);
 
+  static RawString* EscapeQuotes(const String& str);

[cshapiro, 2012/07/10 19:03:27]

I am confused by this method name, possibly because I don't fully understand the
context of this change.

The only quotes being escaped are double quotes.  I do not understand why single
quotes are excluded.  But, since we have 2 distinct classes of quotes and only
one is being escaped, renaming this to EscapeDoubleQuotes makes more sense,
especially in the absence of comments.

[siva, 2012/07/10 22:59:10]

I will rename this method to EscapeDoubleQuotes.

Only double quotes need to be escaped as I am quoting the strings with double
quotes.

On 2012/07/10 19:03:27, cshapiro wrote:

+
   static RawString* Concat(const String& str1,
                            const String& str2,
                            Heap::Space space = Heap::kNew);