linux: fix and build test plugins on 64-bit builds

webkit/tools/npapi_layout_test_plugin/PluginObject.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 483 matching lines @@
 
 static bool testGetIntIdentifier(PluginObject*, const NPVariant* args, uint32_t argCount, NPVariant* result)
 {
     if (argCount != 1)
         return false;
 
     NPIdentifier identifier;
 
     if (NPVARIANT_IS_DOUBLE(args[0])) {
         identifier = browser->getintidentifier((int)NPVARIANT_TO_DOUBLE(args[0]));
-        INT32_TO_NPVARIANT((int32)identifier, *result);
-        return true;
     } else if (NPVARIANT_IS_INT32(args[0])) {
         identifier = browser->getintidentifier((int)NPVARIANT_TO_INT32(args[0]));
-        INT32_TO_NPVARIANT((int32)identifier, *result);
-        return true;
+    } else {
+        return false;
     }
-    return false;
+
+    INT32_TO_NPVARIANT(static_cast<int32>(reinterpret_cast<intptr_t>(identifier)), *result);
+    return true;
 }
 
 static bool testGetProperty(PluginObject* obj, const NPVariant* args, uint32_t argCount, NPVariant* result)
 {
     if (argCount == 0)
         return false;
 
     NPObject *object;
     browser->getvalue(obj->npp, NPNVWindowNPObject, &object);
 
@@ skipping 398 matching lines @@
     DOUBLE_TO_NPVARIANT(242.242, args[4]);
     STRINGZ_TO_NPVARIANT("Hello, World", args[5]);
     OBJECT_TO_NPVARIANT(windowScriptObject, args[6]);
 
     NPVariant result;
     if (browser->invoke(npp, windowScriptObject, testNPInvoke, args, 7, &result))
         browser->releasevariantvalue(&result);
 
     browser->releaseobject(windowScriptObject);
 }