fix copy/paste error in r16955

TBR=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/24721002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16956 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

include/v8.h

@@ -4052,7 +4052,7 @@ class V8_EXPORT Isolate {
    * operation; the caller must return immediately and only after the exception
    * has been handled does it become legal to invoke JavaScript operations.
    */
-  Local<Value> V8_EXPORT ThrowException(Local<Value> exception);
+  Local<Value> ThrowException(Local<Value> exception);
 
   /**
    * Allows the host application to group objects together. If one