Fix gcc 4.7 building problems - cont 2.

webkit/plugins/npapi/test/plugin_execute_stream_javascript.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "webkit/plugins/npapi/test/plugin_execute_stream_javascript.h"
 
 #include "base/basictypes.h"
 #include "webkit/plugins/npapi/test/plugin_client.h"
 
 namespace NPAPIClient {
@@ skipping 20 matching lines @@
     SetError("Write got null stream");
     return -1;
   }
   if (len < 0 || len > kMaxLength) {
     SetError("Write got bogus stream chunk size");
     return -1;
   }
 
   std::string javascript("javascript:");
   javascript.append(static_cast<char*>(buffer), len);
+  size_t js_length = javascript.length();
+  if (js_length != static_cast<uint32_t>(js_length)) {
+    SetError("Javascript too long.");
+    return -1;
+  }
 
-  NPString script_string = { javascript.c_str(), javascript.length() };
+  NPString script_string = { javascript.c_str(),
+                             static_cast<uint32_t>(js_length) };
   NPObject *window_obj = NULL;
   NPAPIClient::PluginClient::HostFunctions()->getvalue(
       id(), NPNVWindowNPObject, &window_obj);
 
   NPVariant unused_result;
   NPAPIClient::PluginClient::HostFunctions()->evaluate(
       id(), window_obj, &script_string, &unused_result);
 
   return len;
 }
 
 NPError ExecuteStreamJavaScript::DestroyStream(NPStream *stream,
                                                NPError reason) {
   return NPERR_NO_ERROR;
 }
 
 } // namespace NPAPIClient