[tracing] Support shared and private permission. (missing perm flag)

components/tracing/process_metrics_memory_dump_provider.cc

 // 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.
 
 #include "components/tracing/process_metrics_memory_dump_provider.h"
 
 #include <fcntl.h>
 #include <stdint.h>
 
 #include <map>
@@ skipping 42 matching lines @@
     region->size_in_bytes = end_addr - region->start_address;
   } else {
     // This is not just paranoia, it can actually happen (See crbug.com/461237).
     region->size_in_bytes = 0;
     res = false;
   }
 
   region->protection_flags = 0;
   if (protection_flags[0] == 'r') {
     region->protection_flags |=
-        base::trace_event::ProcessMemoryMaps::VMRegion::kProtectionFlagsRead;
+      base::trace_event::ProcessMemoryMaps::VMRegion::kProtectionFlagsRead;
   }
   if (protection_flags[1] == 'w') {
     region->protection_flags |=
-        base::trace_event::ProcessMemoryMaps::VMRegion::kProtectionFlagsWrite;
+      base::trace_event::ProcessMemoryMaps::VMRegion::kProtectionFlagsWrite;
   }
   if (protection_flags[2] == 'x') {
     region->protection_flags |=
-        base::trace_event::ProcessMemoryMaps::VMRegion::kProtectionFlagsExec;
+      base::trace_event::ProcessMemoryMaps::VMRegion::kProtectionFlagsExec;
+  }
+  if (protection_flags[3] == 's') {
+    region->protection_flags |=
+      base::trace_event::ProcessMemoryMaps::VMRegion::kProtectionFlagsMayshare;
   }
 
   region->mapped_file = mapped_file;
   base::TrimWhitespaceASCII(region->mapped_file, base::TRIM_ALL,
                             &region->mapped_file);
 
   return res;
 }
 
 uint64_t ReadCounterBytes(char* counter_line) {
@@ skipping 214 matching lines @@
 
   pmd->process_totals()->set_resident_set_bytes(rss_bytes);
   pmd->set_has_process_totals();
   pmd->process_totals()->set_peak_resident_set_bytes(peak_rss_bytes);
 
   // Returns true even if other metrics failed, since rss is reported.
   return true;
 }
 
 }  // namespace tracing