Add --headless flag to Windows

headless/lib/browser/headless_print_manager.cc

 // Copyright 2017 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 "headless/lib/browser/headless_print_manager.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/base64.h"
@@ skipping 99 matching lines @@
     if (range.to > pages_count)
       return LIMIT_ERROR;
 
     // Page numbers are 1-based in the dictionary.
     // Page numbers are 0-based for the print settings.
     range.from--;
     range.to--;
     page_ranges.push_back(range);
   }
   *pages = PageRange::GetPages(page_ranges);
-  return NO_ERROR;
+  return PRINT_NO_ERROR;
 }
 
 void HeadlessPrintManager::GetPDFContents(content::RenderFrameHost* rfh,
                                           const HeadlessPrintSettings& settings,
                                           const GetPDFCallback& callback) {
   DCHECK(callback);
 
   if (callback_) {
     callback.Run(SIMULTANEOUS_PRINT_ACTIVE, std::string());
     return;
@@ skipping 68 matching lines @@
       page_ranges_text_, params.expected_pages_count, &print_params_->pages);
   switch (status) {
     case SYNTAX_ERROR:
       printing_rfh_->Send(reply_msg);
       ReleaseJob(PAGE_RANGE_SYNTAX_ERROR);
       return;
     case LIMIT_ERROR:
       printing_rfh_->Send(reply_msg);
       ReleaseJob(PAGE_COUNT_EXCEEDED);
       return;
-    case NO_ERROR:
+    case PRINT_NO_ERROR:
       PrintHostMsg_ScriptedPrint::WriteReplyParams(reply_msg, *print_params_);
       printing_rfh_->Send(reply_msg);
       return;
     default:
       NOTREACHED();
       return;
   }
 }
 
 void HeadlessPrintManager::OnShowInvalidPrinterSettingsError() {
@@ skipping 76 matching lines @@
   if (result == PRINT_SUCCESS)
     callback_.Run(result, std::move(data_));
   else
     callback_.Run(result, std::string());
   printing_rfh_->Send(new PrintMsg_PrintingDone(printing_rfh_->GetRoutingID(),
                                                 result == PRINT_SUCCESS));
   Reset();
 }
 
 }  // namespace printing