Define crash keys in the directory hierarchy where they are used.

components/crash/core/common/crash_keys.h

 // Copyright 2015 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 COMPONENTS_CRASH_CORE_COMMON_CRASH_KEYS_H_
 #define COMPONENTS_CRASH_CORE_COMMON_CRASH_KEYS_H_
 
 #include <stddef.h>
 
 #include <string>
 #include <vector>
 
 #include "base/debug/crash_logging.h"
 #include "build/build_config.h"
 
 namespace base {
 class CommandLine;
 }  // namespace base
 
 namespace crash_keys {
 
+
 // Sets the ID (which may either be a full GUID or a GUID that was already
 // stripped from its dashes -- in either case this method will strip remaining
 // dashes before setting the crash key).
 void SetMetricsClientIdFromGUID(const std::string& metrics_client_guid);
 void ClearMetricsClientId();
 
 // Sets the list of active experiment/variations info.
 void SetVariationsList(const std::vector<std::string>& variations);
 
 // Adds a common set of crash keys for holding command-line switches to |keys|.
 void GetCrashKeysForCommandLineSwitches(
     std::vector<base::debug::CrashKey>* keys);
 
+// Appends crash keys used under //components/crash to |keys|.
+void AppendCrashCrashKeys(std::vector<base::debug::CrashKey>* keys);
+
 // A function returning true if |flag| is a switch that should be filtered out
 // of crash keys.
 using SwitchFilterFunction = bool (*)(const std::string& flag);
 
 // Sets the kNumSwitches key and a set of keys named using kSwitchFormat based
 // on the given |command_line|. If |skip_filter| is not null, ignore any switch
 // for which it returns true.
 void SetSwitchesFromCommandLine(const base::CommandLine& command_line,
                                 SwitchFilterFunction skip_filter);
 
@@ skipping 69 matching lines @@
 // deliberate crash.
 extern const char kZombie[];
 extern const char kZombieTrace[];
 
 }  // namespace mac
 #endif
 
 }  // namespace crash_keys
 
 #endif  // COMPONENTS_CRASH_CORE_COMMON_CRASH_KEYS_H_