Fix crash in InvokeOnMemoryDump when tracing

components/tracing/common/process_metrics_memory_dump_provider.h

Index: components/tracing/common/process_metrics_memory_dump_provider.h
diff --git a/components/tracing/common/process_metrics_memory_dump_provider.h b/components/tracing/common/process_metrics_memory_dump_provider.h
index 6534f18bf43d8f0afb04e4e8ee02f9bffaa06223..efbb92dc7bdf4a40c0ff8c6e5f6d2ec24cbf1c10 100644
--- a/components/tracing/common/process_metrics_memory_dump_provider.h
+++ b/components/tracing/common/process_metrics_memory_dump_provider.h
@@ -37,12 +37,20 @@ class TRACING_EXPORT ProcessMetricsMemoryDumpProvider
   void PollFastMemoryTotal(uint64_t* memory_total) override;
   void SuspendFastMemoryPolling() override;
 
+ protected:
+  ProcessMetricsMemoryDumpProvider(base::ProcessId process);
+
  private:
+  using FactoryFunction =
+      std::unique_ptr<ProcessMetricsMemoryDumpProvider> (*)(base::ProcessId);
+
   FRIEND_TEST_ALL_PREFIXES(ProcessMetricsMemoryDumpProviderTest,
                            ParseProcSmaps);
   FRIEND_TEST_ALL_PREFIXES(ProcessMetricsMemoryDumpProviderTest, DumpRSS);
   FRIEND_TEST_ALL_PREFIXES(ProcessMetricsMemoryDumpProviderTest,
                            TestPollFastMemoryTotal);
+  FRIEND_TEST_ALL_PREFIXES(ProcessMetricsMemoryDumpProviderTest,
+                           DoubleRegister);
 #if defined(OS_MACOSX)
   FRIEND_TEST_ALL_PREFIXES(ProcessMetricsMemoryDumpProviderTest,
                            TestMachOReading);
@@ -53,14 +61,15 @@ class TRACING_EXPORT ProcessMetricsMemoryDumpProvider
                            TestWinModuleReading);
 #endif
 
-  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;
+  static FactoryFunction factory_for_testing;
+  static std::unique_ptr<ProcessMetricsMemoryDumpProvider>
+  CreateMetricsProvider(base::ProcessId process);
 
 #if defined(OS_LINUX) || defined(OS_ANDROID)
   static FILE* proc_smaps_for_testing;