Fix GCC 4.6 build.

test/cctest/test-api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 16767 matching lines @@
     // recursive call into Javascript is done in the finally block, e.g. to
     // initialize an IC. (crbug.com/129171)
     TryCatch try_catch;
     const char* trigger_ic =
         "try {                      \n"
         "  throw new Error('test'); \n"
         "} finally {                \n"
         "  var x = 0;               \n"
         "  x++;                     \n"  // Trigger an IC initialization here.
         "}                          \n";
-    Local<Value> result = CompileRun(trigger_ic);
+    CompileRun(trigger_ic);
     CHECK(try_catch.HasCaught());
     Local<Message> message = try_catch.Message();
     CHECK(!message.IsEmpty());
     CHECK_EQ(2, message->GetLineNumber());
   }
 
   {
     // Test that the original exception message is indeed overwritten if
     // a new error is thrown in the finally block.
     TryCatch try_catch;
     const char* throw_again =
         "try {                       \n"
         "  throw new Error('test');  \n"
         "} finally {                 \n"
         "  var x = 0;                \n"
         "  x++;                      \n"
         "  throw new Error('again'); \n"  // This is the new uncaught error.
         "}                           \n";
-    Local<Value> result = CompileRun(throw_again);
+    CompileRun(throw_again);
     CHECK(try_catch.HasCaught());
     Local<Message> message = try_catch.Message();
     CHECK(!message.IsEmpty());
     CHECK_EQ(6, message->GetLineNumber());
   }
 }