Printing: Add command line switch to rendering text with GDI.

chrome/browser/printing/print_view_manager_base.cc

 // Copyright 2013 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 "chrome/browser/printing/print_view_manager_base.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 175 matching lines @@
     if (!metafile->InitFromData(shared_buf->memory(), params.data_size)) {
       NOTREACHED() << "Invalid metafile header";
       web_contents()->Stop();
       return;
     }
   }
 
 #if defined(OS_WIN)
   print_job_->AppendPrintedPage(params.page_number);
   if (metafile_must_be_valid) {
+    // TODO(thestig): Figure out why rendering text with GDI results in random
+    // missing characters for some users. https://crbug.com/658606
+    bool print_text_with_gdi =
+        document->settings().print_text_with_gdi() &&
+        !document->settings().printer_is_xps() &&
+        switches::GDITextPrintingEnabled();
     scoped_refptr<base::RefCountedBytes> bytes = new base::RefCountedBytes(
         reinterpret_cast<const unsigned char*>(shared_buf->memory()),
         params.data_size);
 
     document->DebugDumpData(bytes.get(), FILE_PATH_LITERAL(".pdf"));
-    // TODO(thestig): Figure out why rendering text with GDI results in random
-    // missing characters for some users. https://crbug.com/658606
     print_job_->StartPdfToEmfConversion(
         bytes, params.page_size, params.content_area,
-        false /* print_text_with_gdi? */);
+        print_text_with_gdi);
   }
 #else
   // Update the rendered document. It will send notifications to the listener.
   document->SetPage(params.page_number, std::move(metafile), params.page_size,
                     params.content_area);
 
   ShouldQuitFromInnerMessageLoop();
 #endif
 }
 
@@ skipping 318 matching lines @@
   scoped_refptr<PrinterQuery> printer_query;
   printer_query = queue_->PopPrinterQuery(cookie);
   if (!printer_query.get())
     return;
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&PrinterQuery::StopWorker, printer_query));
 }
 
 }  // namespace printing