ozone: drm: Add fd number to crash keys when dmabuf mmap fails.

chrome/common/crash_keys.cc

 // Copyright (c) 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/common/crash_keys.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
@@ skipping 141 matching lines @@
 #endif
     {kInputEventFilterSendFailure, kSmallSize},
 #if defined(OS_CHROMEOS)
     {kNumberOfUsers, kSmallSize},
     // Temporary for https://crbug.com/660960
     {kLastGoodCloseStack, kMediumSize},
     // Temporary for https://crbug.com/629521
     {"mmap_params", kSmallSize},
     {"buffer_size", kSmallSize},
     {"errno", kSmallSize},
+    {"number_of_fds", kSmallSize},
 #endif
 #if defined(OS_MACOSX)
     {mac::kFirstNSException, kMediumSize},
     {mac::kFirstNSExceptionTrace, kMediumSize},
     {mac::kLastNSException, kMediumSize},
     {mac::kLastNSExceptionTrace, kMediumSize},
     {mac::kNSException, kMediumSize},
     {mac::kNSExceptionTrace, kMediumSize},
     {mac::kSendAction, kMediumSize},
     {mac::kNSEvent, kMediumSize},
@@ skipping 205 matching lines @@
 }
 
 ScopedPrinterInfo::~ScopedPrinterInfo() {
   for (size_t i = 0; i < kPrinterInfoCount; ++i) {
     std::string key = base::StringPrintf(kPrinterInfo, i + 1);
     base::debug::ClearCrashKey(key);
   }
 }
 
 }  // namespace crash_keys