This fixes http://code.google.com/p/chromium/issues/detail?id=2472, which...

webkit/port/bindings/v8/np_v8object.cpp

 /*
  * Copyright (C) 2004, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2007 Google, 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
@@ skipping 23 matching lines @@
 #include "np_v8object.h"
 #include "Frame.h"
 #include "bindings/npruntime.h"
 #include "npruntime_priv.h"
 #include "PlatformString.h"
 #include "ScriptController.h"
 #include "v8_helpers.h"
 #include "v8_np_utils.h"
 #include "v8_proxy.h"
 #include "DOMWindow.h"
+#include "glue/plugins/plugin_instance.h"
 
 using WebCore::V8ClassIndex;
 using WebCore::V8Proxy;
 
 namespace {
 
 // TODO(mbelshe): comments on why use malloc and free.
 static NPObject* AllocV8NPObject(NPP, NPClass*) {
   return static_cast<NPObject*>(malloc(sizeof(V8NPObject)));
 }
@@ skipping 181 matching lines @@
 
   if (npobj->_class->invokeDefault)
     return npobj->_class->invokeDefault(npobj, args, argCount, result);
 
   VOID_TO_NPVARIANT(*result);
   return true;
 }
 
 bool NPN_Evaluate(NPP npp, NPObject *npobj, NPString *npscript,
                   NPVariant *result) {
+  bool popups_allowed = false;
+
+  if (npp) {
+    NPAPI::PluginInstance* plugin_instance =
+        reinterpret_cast<NPAPI::PluginInstance*>(npp->ndata);
+    if (plugin_instance)
+      popups_allowed = plugin_instance->popups_allowed();
+  }
+
+  return NPN_EvaluateHelper(npp, popups_allowed, npobj, npscript, result);
+}
+
+bool NPN_EvaluateHelper(NPP npp, bool popups_allowed, NPObject *npobj,
+                        NPString *npscript, NPVariant *result) {
   VOID_TO_NPVARIANT(*result);
   if (npobj == NULL)
     return false;
 
   if (npobj->_class == NPScriptObjectClass) {
     v8::HandleScope handle_scope;
     v8::Handle<v8::Context> context = GetV8Context(npp, npobj);
     if (context.IsEmpty())
       return false;
 
     WebCore::V8Proxy* proxy = GetV8Proxy(npobj);
     ASSERT(proxy);
 
     v8::Context::Scope scope(context);
 
-    WebCore::String filename("npscript");
+    // Passing in a NULL filename is the trick used in V8 to indicate
+    // user gesture. See the inline_code/setInlineCode functions in V8Proxy
+    // for more information.
+    WebCore::String filename;
+    if (!popups_allowed)
+      filename = "npscript";
+
     // Convert UTF-8 stream to WebCore::String.
     WebCore::String script = WebCore::String::fromUTF8(
         npscript->UTF8Characters, npscript->UTF8Length);
     v8::Local<v8::Value> v8result =
         proxy->Evaluate(filename, 0, script, NULL);
 
     // If we had an error, return false.
     if (v8result.IsEmpty()) return false;
 
     ConvertV8ObjectToNPVariant(v8result, npobj, result);
@@ skipping 202 matching lines @@
     return true;
   }
 
   if (NP_CLASS_STRUCT_VERSION_HAS_ENUM(npobj->_class) &&
       npobj->_class->enumerate) {
      return npobj->_class->enumerate(npobj, identifier, count);
   }
 
   return false;
 }