remove most uses of raw handle constructors

src/d8-debug.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 50 matching lines @@
   // Check for handled event.
   if (event != Break && event != Exception && event != AfterCompile) {
     return;
   }
 
   TryCatch try_catch;
 
   // Get the toJSONProtocol function on the event and get the JSON format.
   Local<String> to_json_fun_name = String::New("toJSONProtocol");
   Local<Function> to_json_fun =
-      Function::Cast(*event_data->Get(to_json_fun_name));
+      Local<Function>::Cast(event_data->Get(to_json_fun_name));
   Local<Value> event_json = to_json_fun->Call(event_data, 0, NULL);
   if (try_catch.HasCaught()) {
     Shell::ReportException(isolate, &try_catch);
     return;
   }
 
   // Print the event details.
   Handle<Object> details =
       Shell::DebugMessageDetails(isolate, Handle<String>::Cast(event_json));
   if (try_catch.HasCaught()) {
     Shell::ReportException(isolate, &try_catch);
     return;
   }
   String::Utf8Value str(details->Get(String::New("text")));
   if (str.length() == 0) {
     // Empty string is used to signal not to process this event.
     return;
   }
   printf("%s\n", *str);
 
   // Get the debug command processor.
   Local<String> fun_name = String::New("debugCommandProcessor");
-  Local<Function> fun = Function::Cast(*exec_state->Get(fun_name));
+  Local<Function> fun = Local<Function>::Cast(exec_state->Get(fun_name));
   Local<Object> cmd_processor =
-      Object::Cast(*fun->Call(exec_state, 0, NULL));
+      Local<Object>::Cast(fun->Call(exec_state, 0, NULL));
   if (try_catch.HasCaught()) {
     Shell::ReportException(isolate, &try_catch);
     return;
   }
 
   static const int kBufferSize = 256;
   bool running = false;
   while (!running) {
     char command[kBufferSize];
     PrintPrompt(running);
@@ skipping 258 matching lines @@
     // Pass the keyboard command to the main thread.
     remote_debugger_->KeyboardCommand(
         i::SmartArrayPointer<char>(i::StrDup(command)));
   }
 }
 
 
 }  // namespace v8
 
 #endif  // ENABLE_DEBUGGER_SUPPORT