Enable warning 4389 as an error on windows builds. This will make...

chrome_frame/urlmon_url_request.cc

Index: chrome_frame/urlmon_url_request.cc
===================================================================
--- chrome_frame/urlmon_url_request.cc	(revision 48060)
+++ chrome_frame/urlmon_url_request.cc	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -119,7 +119,7 @@
   DLOG(INFO) << __FUNCTION__ << me();
 
   // Re-entrancy check. Thou shall not call Read() while process OnReadComplete!
-  DCHECK_EQ(0, pending_read_size_);
+  DCHECK_EQ(0u, pending_read_size_);
   if (pending_read_size_ != 0)
     return false;
 
@@ -1136,7 +1136,7 @@
   DLOG(INFO) << __FUNCTION__;
   DCHECK(status.status() != URLRequestStatus::CANCELED);
   RequestMap::size_type n = request_map_.erase(request_id);
-  DCHECK_EQ(1, n);
+  DCHECK_EQ(1u, n);
   ++calling_delegate_;
   delegate_->OnResponseEnd(request_id, status);
   --calling_delegate_;