[memory-infra] Make thread check at unregistration stricter for new dump providers

base/trace_event/memory_dump_manager.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 BASE_TRACE_EVENT_MEMORY_DUMP_MANAGER_H_
 #define BASE_TRACE_EVENT_MEMORY_DUMP_MANAGER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 348 matching lines @@
   // runner affinity (MDPs belonging to the same task runners are adjacent).
   MemoryDumpProviderInfo::OrderedSet dump_providers_;
 
   // A copy of mdpinfo list that support polling. It must be accessed only on
   // the dump thread if dump thread exists.
   MemoryDumpProviderInfo::OrderedSet dump_providers_for_polling_;
 
   // Shared among all the PMDs to keep state scoped to the tracing session.
   scoped_refptr<MemoryDumpSessionState> session_state_;
 
+  // The list of names of dump providers that are blacklisted from strict thread
+  // affinity check on unregistration.
+  std::unordered_set<StringPiece, StringPieceHash>
+      strict_thread_check_blacklist_;
+
   MemoryDumpManagerDelegate* delegate_;  // Not owned.
 
   // When true, this instance is in charge of coordinating periodic dumps.
   bool is_coordinator_;
 
   // Protects from concurrent accesses to the |dump_providers_*| and |delegate_|
   // to guard against disabling logging while dumping on another thread.
   Lock lock_;
 
   // Optimization to avoid attempting any memory dump (i.e. to not walk an empty
@@ skipping 41 matching lines @@
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MemoryDumpManagerDelegate);
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_MEMORY_DUMP_MANAGER_H_