Less strict CHECK for DeviceCapabilities results.

printing/backend/print_backend_win.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 "printing/backend/print_backend.h"
 
 #include <objidl.h>
 #include <winspool.h>
 
 #include "base/memory/scoped_ptr.h"
+#include "base/numerics/safe_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/scoped_bstr.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/scoped_hglobal.h"
 #include "printing/backend/print_backend_consts.h"
 #include "printing/backend/printing_info_win.h"
 #include "printing/backend/win_helper.h"
 
 namespace printing {
@@ skipping 14 matching lines @@
 }
 
 template <class T>
 void GetDeviceCapabilityArray(const wchar_t* printer,
                               const wchar_t* port,
                               WORD id,
                               std::vector<T>* result) {
   int count = DeviceCapabilities(printer, port, id, NULL, NULL);
   if (count <= 0)
     return;
-  result->resize(count);
-  CHECK_EQ(count,
-           DeviceCapabilities(printer, port, id,
-                              reinterpret_cast<LPTSTR>(result->data()), NULL));
+  std::vector<T> tmp;
+  tmp.resize(count * 2);
+  count = DeviceCapabilities(printer, port, id,
+                             reinterpret_cast<LPTSTR>(tmp.data()), NULL);
+  if (count <= 0)
+    return;
+  CHECK_LE(count, base::checked_cast<int>(tmp.size()));
+  tmp.resize(count);
+  result->swap(tmp);
 }
 
 void LoadPaper(const wchar_t* printer,
                const wchar_t* port,
                const DEVMODE* devmode,
                PrinterSemanticCapsAndDefaults* caps) {
   static const size_t kToUm = 100;  // Windows uses 0.1mm.
   static const size_t kMaxPaperName = 64;
 
   struct PaperName {
@@ skipping 295 matching lines @@
   ScopedPrinterHandle printer_handle;
   return printer_handle.OpenPrinter(base::UTF8ToWide(printer_name));
 }
 
 scoped_refptr<PrintBackend> PrintBackend::CreateInstance(
     const base::DictionaryValue* print_backend_settings) {
   return new PrintBackendWin;
 }
 
 }  // namespace printing