Fixes for re-enabling more MSVC level 4 warnings: content/ edition

content/child/npapi/plugin_instance.cc

 // Copyright (c) 2012 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 "content/child/npapi/plugin_instance.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 388 matching lines @@
   }
 }
 
 void PluginInstance::DidReceiveManualResponse(const GURL& url,
                                               const std::string& mime_type,
                                               const std::string& headers,
                                               uint32 expected_length,
                                               uint32 last_modified) {
   DCHECK(load_manually_);
 
-  plugin_data_stream_ = CreateStream(-1, url, mime_type, 0);
+  plugin_data_stream_ =
+      CreateStream(static_cast<unsigned long>(-1), url, mime_type, 0);
   plugin_data_stream_->DidReceiveResponse(mime_type, headers, expected_length,
                                           last_modified, true);
 }
 
 void PluginInstance::DidReceiveManualData(const char* buffer, int length) {
   DCHECK(load_manually_);
   if (plugin_data_stream_.get() != NULL) {
     plugin_data_stream_->DidReceiveData(buffer, length, 0);
   }
 }
@@ skipping 267 matching lines @@
     if (plugin_stream->notify_data() == notify_data) {
       PluginStreamUrl* plugin_stream_url =
           static_cast<PluginStreamUrl*>(plugin_stream);
       plugin_stream_url->URLRedirectResponse(allow);
       break;
     }
   }
 }
 
 }  // namespace content