Postmortem report collection: validate internal state

base/debug/activity_tracker.h

 // Copyright 2016 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.
 
 // Activity tracking provides a low-overhead method of collecting information
 // about the state of the application for analysis both while it is running
 // and after it has terminated unexpectedly. Its primary purpose is to help
 // locate reasons the browser becomes unresponsive by providing insight into
 // what all the various threads and processes are (or were) doing.
 
@@ skipping 1004 matching lines @@
       tracker->RecordFieldTrial(trial_name, group_name);
   }
 
   // Record exception information for the current thread.
   ALWAYS_INLINE
   void RecordException(const void* origin, uint32_t code) {
     return RecordExceptionImpl(::tracked_objects::GetProgramCounter(), origin,
                                code);
   }
 
+  // Marks the tracked data as deleted.
+  void MarkDeleted();
+
   // Gets the process ID used for tracking. This is typically the same as what
   // the OS thinks is the current process but can be overridden for testing.
-  int64_t process_id() { return process_id_; };
+  int64_t process_id() { return process_id_; }
 
   // Accesses the process data record for storing arbitrary key/value pairs.
   // Updates to this are thread-safe.
   ActivityUserData& process_data() { return process_data_; }
 
  private:
   friend class GlobalActivityAnalyzer;
   friend class ScopedThreadActivity;
   friend class ActivityTrackerTest;
 
@@ skipping 296 matching lines @@
   ScopedProcessWaitActivity(const void* program_counter,
                             const base::Process* process);
   DISALLOW_COPY_AND_ASSIGN(ScopedProcessWaitActivity);
 };
 #endif
 
 }  // namespace debug
 }  // namespace base
 
 #endif  // BASE_DEBUG_ACTIVITY_TRACKER_H_