[iOS] Disable COUNT_RESIDENT_BYTES_SUPPORTED.

base/trace_event/process_memory_dump.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_PROCESS_MEMORY_DUMP_H_
 #define BASE_TRACE_EVENT_PROCESS_MEMORY_DUMP_H_
 
 #include <vector>
 
 #include "base/base_export.h"
 #include "base/containers/hash_tables.h"
 #include "base/containers/small_map.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
 #include "base/trace_event/memory_allocator_dump.h"
 #include "base/trace_event/memory_allocator_dump_guid.h"
 #include "base/trace_event/memory_dump_session_state.h"
 #include "base/trace_event/process_memory_maps.h"
 #include "base/trace_event/process_memory_totals.h"
 
 // Define COUNT_RESIDENT_BYTES_SUPPORTED if platform supports counting of the
 // resident memory.
-#if defined(OS_POSIX) && !defined(OS_NACL)
+// TODO(crbug.com/542671): COUNT_RESIDENT_BYTES_SUPPORTED is disabled on iOS
+// as it cause memory corruption on iOS 9.0+ devices.
+#if defined(OS_POSIX) && !defined(OS_NACL) && !defined(OS_IOS)
 #define COUNT_RESIDENT_BYTES_SUPPORTED
 #endif
 
 namespace base {
 namespace trace_event {
 
 class ConvertableToTraceFormat;
 class MemoryDumpManager;
 class MemoryDumpSessionState;
 class TracedValue;
@@ skipping 142 matching lines @@
   // Keeps track of relationships between MemoryAllocatorDump(s).
   std::vector<MemoryAllocatorDumpEdge> allocator_dumps_edges_;
 
   DISALLOW_COPY_AND_ASSIGN(ProcessMemoryDump);
 };
 
 }  // namespace trace_event
 }  // namespace base
 
 #endif  // BASE_TRACE_EVENT_PROCESS_MEMORY_DUMP_H_