Emit VMRegions for macOS when doing process memory dumps.

components/tracing/common/process_metrics_memory_dump_provider.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 COMPONENTS_TRACING_COMMON_PROCESS_MEMORY_METRICS_DUMP_PROVIDER_H_
 #define COMPONENTS_TRACING_COMMON_PROCESS_MEMORY_METRICS_DUMP_PROVIDER_H_
 
 #include <memory>
 
 #include "base/files/scoped_file.h"
@@ skipping 25 matching lines @@
                     base::trace_event::ProcessMemoryDump* pmd) override;
   void PollFastMemoryTotal(uint64_t* memory_total) override;
   void SuspendFastMemoryPolling() override;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ProcessMetricsMemoryDumpProviderTest,
                            ParseProcSmaps);
   FRIEND_TEST_ALL_PREFIXES(ProcessMetricsMemoryDumpProviderTest, DumpRSS);
   FRIEND_TEST_ALL_PREFIXES(ProcessMetricsMemoryDumpProviderTest,
                            TestPollFastMemoryTotal);
+#if defined(OS_MACOSX)
+  FRIEND_TEST_ALL_PREFIXES(ProcessMetricsMemoryDumpProviderTest,
+                           TestMachOReading);
+#endif  // defined(OS_MACOSX)
 
   ProcessMetricsMemoryDumpProvider(base::ProcessId process);
 
   bool DumpProcessTotals(const base::trace_event::MemoryDumpArgs& args,
                          base::trace_event::ProcessMemoryDump* pmd);
   bool DumpProcessMemoryMaps(const base::trace_event::MemoryDumpArgs& args,
                              base::trace_event::ProcessMemoryDump* pmd);
 
   static uint64_t rss_bytes_for_testing;
 
@@ skipping 11 matching lines @@
   // older than http://bit.ly/reset_rss or only on child processes if yama LSM
   // sandbox is enabled.
   bool is_rss_peak_resettable_;
 
   DISALLOW_COPY_AND_ASSIGN(ProcessMetricsMemoryDumpProvider);
 };
 
 }  // namespace tracing
 
 #endif  // COMPONENTS_TRACING_COMMON_PROCESS_MEMORY_METRICS_DUMP_PROVIDER_H_