Added TryCatch::ReThrow method.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 5f3b68b2272807206fb2f9592ab8f8ba99e5ec3b..c372d0cea94e2c46f3dea29c6b1af529ec9182c8 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -2473,6 +2473,15 @@ class V8EXPORT TryCatch {
   bool CanContinue() const;
 
   /**
+   * Throws the exception caught by this TryCatch in a way that avoids
+   * it being caught again by this same TryCatch.  As with ThrowException
+   * it is illegal to execute any JavaScript operations after calling
+   * ReThrow; the caller must return immediately to where the exception
+   * is caught.
+   */
+  Handle<Value> ReThrow();
+
+  /**
    * Returns the exception caught by this try/catch block.  If no exception has
    * been caught an empty handle is returned.
    *
@@ -2527,9 +2536,10 @@ class V8EXPORT TryCatch {
   TryCatch* next_;
   void* exception_;
   void* message_;
-  bool is_verbose_;
-  bool can_continue_;
-  bool capture_message_;
+  bool is_verbose_ : 1;
+  bool can_continue_ : 1;
+  bool capture_message_ : 1;
+  bool rethrow_ : 1;
   void* js_handler_;
 };