Cleanup: Remove documentation referring to the linux_breakpad GYP flag.

components/crash/content/app/breakpad_linux_impl.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.
 
 // Internal header file for the Linux breakpad implementation. This file is
-// shared between crash_handler_host_linux.cc and breakpad_linux.cc. It should
-// only be used in files compiled with linux_breakpad=1.
+// shared between crash_handler_host_linux.cc and breakpad_linux.cc.
 
 #ifndef COMPONENTS_CRASH_CONTENT_APP_BREAKPAD_LINUX_IMPL_H_
 #define COMPONENTS_CRASH_CONTENT_APP_BREAKPAD_LINUX_IMPL_H_
 
 #include <sys/types.h>
 
 #include "base/basictypes.h"
 #include "breakpad/src/common/simple_string_dictionary.h"
 #include "components/crash/content/app/breakpad_linux.h"
 
@@ skipping 38 matching lines @@
   size_t oom_size;                 // Amount of memory requested if OOM.
   uint64_t pid;                    // PID where applicable.
   CrashKeyStorage* crash_keys;
 };
 
 extern void HandleCrashDump(const BreakpadInfo& info);
 
 }  // namespace breakpad
 
 #endif  // COMPONENTS_CRASH_CONTENT_APP_BREAKPAD_LINUX_IMPL_H_