Patch for allowing several V8 instances in process:...

src/compiler.h

Index: src/compiler.h
===================================================================
--- src/compiler.h	(revision 3427)
+++ src/compiler.h	(working copy)
@@ -86,7 +86,15 @@
                               Handle<Script> script);
 };
 
+class CompilerData {
+  StaticResource<SafeStringInputBuffer> safe_string_input_buffer_;
 
+  friend class V8Context;
+  friend class Compiler;
+  CompilerData();
+  DISALLOW_COPY_AND_ASSIGN(CompilerData);
+};
+
 // During compilation we need a global list of handles to constants
 // for frame elements.  When the zone gets deleted, we make sure to
 // clear this list of handles as well.