Spellling mistakes.

src/debug.cc

 // Copyright 2011 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 2837 matching lines @@
         event,
         running,
         Handle<JSObject>::cast(exec_state),
         Handle<JSObject>::cast(event_data),
         Handle<String>(Utils::OpenHandle(*response)),
         command.client_data());
     InvokeMessageHandler(message);
     command.Dispose();
 
     // Return from debug event processing if either the VM is put into the
-    // runnning state (through a continue command) or auto continue is active
+    // running state (through a continue command) or auto continue is active
     // and there are no more commands queued.
     if (running && !HasCommands()) {
       return;
     }
   }
 }
 
 
 void Debugger::SetEventListener(Handle<Object> callback,
                                 Handle<Object> data) {
@@ skipping 621 matching lines @@
     {
       Locker locker;
       Isolate::Current()->debugger()->CallMessageDispatchHandler();
     }
   }
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal