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

src/api.h

Index: src/api.h
===================================================================
--- src/api.h	(revision 3427)
+++ src/api.h	(working copy)
@@ -148,7 +148,24 @@
   UNVISITED, VISITED, INSTALLED
 };
 
+class RegisteredExtension;
 
+class internal::ApiData {
+ public:
+  StringInputBuffer write_input_buffer_;
+  // To distinguish the function templates, so that we can find them in the
+  // function cache of the global context.
+  int next_serial_number_;
+
+  EmbeddedVector<char, 128> buffer_;
+
+  ApiData()
+    :next_serial_number_(0) {
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(ApiData);
+};
+
 class RegisteredExtension {
  public:
   explicit RegisteredExtension(Extension* extension);