[tracing] Disable memory maps dump provider for security reason

base/trace_event/memory_dump_manager.cc

Index: base/trace_event/memory_dump_manager.cc
diff --git a/base/trace_event/memory_dump_manager.cc b/base/trace_event/memory_dump_manager.cc
index f76ac55a69bdacc58dabb4d1af8113687c968a52..538b59b966df4e4f4b56f9360de1078c652f6868 100644
--- a/base/trace_event/memory_dump_manager.cc
+++ b/base/trace_event/memory_dump_manager.cc
@@ -115,7 +115,11 @@ void MemoryDumpManager::Initialize() {
 
   // Enable the core dump providers.
 #if !defined(OS_NACL)
-  RegisterDumpProvider(ProcessMemoryTotalsDumpProvider::GetInstance());
+  // The memory maps dump provider is currently disabled for security reasons
+  // and will be enabled once tracing is more secure. It is still enabled for
+  // running benchmarks.
+  if (CommandLine::ForCurrentProcess()->HasSwitch("enable-memory-benchmarking"))
+    RegisterDumpProvider(ProcessMemoryTotalsDumpProvider::GetInstance());
 #endif
 
 #if defined(OS_LINUX) || defined(OS_ANDROID)