[tracing] Add native allocation tracing mode.

base/base_switches.h

 // 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.
 
 // Defines all the "base" command-line switches.
 
 #ifndef BASE_BASE_SWITCHES_H_
 #define BASE_BASE_SWITCHES_H_
 
 #include "build/build_config.h"
 
 namespace switches {
 
 extern const char kDisableBreakpad[];
 extern const char kDisableLowEndDeviceMode[];
 extern const char kEnableCrashReporter[];
 extern const char kEnableHeapProfiling[];
+extern const char kEnableHeapProfilingModeNative[];
 extern const char kEnableLowEndDeviceMode[];
 extern const char kForceFieldTrials[];
 extern const char kFullMemoryCrashReport[];
 extern const char kNoErrorDialogs[];
 extern const char kProfilerTiming[];
 extern const char kProfilerTimingDisabledValue[];
 extern const char kTestChildProcess[];
 extern const char kTestDoNotInitializeIcu[];
 extern const char kTraceToFile[];
 extern const char kTraceToFileName[];
 extern const char kV[];
 extern const char kVModule[];
 extern const char kWaitForDebugger[];
 
 #if defined(OS_WIN)
 extern const char kDisableUsbKeyboardDetect[];
 #endif
 
 #if defined(OS_POSIX)
 extern const char kEnableCrashReporterForTesting[];
 #endif
 
 }  // namespace switches
 
 #endif  // BASE_BASE_SWITCHES_H_