Turn components/crash into a layered component.

components/crash/app/breakpad_linux.h

-// 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.
-
-// Public interface for enabling Breakpad on Linux systems.
-
-#ifndef COMPONENTS_CRASH_APP_BREAKPAD_LINUX_H_
-#define COMPONENTS_CRASH_APP_BREAKPAD_LINUX_H_
-
-#include <string>
-
-#include "build/build_config.h"
-
-namespace breakpad {
-
-// Turns on the crash reporter in any process.
-extern void InitCrashReporter(const std::string& process_type);
-
-// Enables the crash reporter in child processes.
-#if defined(OS_ANDROID)
-extern void InitNonBrowserCrashReporterForAndroid(
-    const std::string& process_type);
-#endif
-
-// Checks if crash reporting is enabled. Note that this is not the same as
-// being opted into metrics reporting (and crash reporting), which controls
-// whether InitCrashReporter() is called.
-bool IsCrashReporterEnabled();
-
-}  // namespace breakpad
-
-#endif  // COMPONENTS_CRASH_APP_BREAKPAD_LINUX_H_