Fix html_viewer Windows build after r327559

mojo/runner/native_application_support.h

 // Copyright 2014 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.
 
 #ifndef MOJO_RUNNER_NATIVE_APPLICATION_SUPPORT_H_
 #define MOJO_RUNNER_NATIVE_APPLICATION_SUPPORT_H_
 
 #include "base/native_library.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "mojo/shell/native_runner.h"
 
-#if defined(OS_WIN)
-#undef DELETE
-#endif
-
 namespace base {
 class FilePath;
 }
 
 namespace mojo {
 
 class Application;
 
 namespace runner {
 
@@ skipping 16 matching lines @@
 // true if |MojoMain()| was called (even if it returns an error), and false
 // otherwise.
 // TODO(vtl): Maybe this should also have a |MojoResult| as an out parameter?
 bool RunNativeApplication(base::NativeLibrary app_library,
                           InterfaceRequest<Application> application_request);
 
 }  // namespace runner
 }  // namespace mojo
 
 #endif  // MOJO_RUNNER_NATIVE_APPLICATION_SUPPORT_H_