Implement profiler log writing at shutdown

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index 85aa36bc70f4a2772431562ba7f2f0c726c7d7a3..e81e82330fe42a95053d53491cc0441df61e20b6 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -1155,6 +1155,12 @@ int ChromeBrowserMainParts::PreCreateThreadsImpl() {
     tracked_objects::ThreadData::InitializeAndSetTrackingStatus(enabled);
   }
 
+  if (parsed_command_line().HasSwitch(switches::kProfilingOutputFile)) {
+    tracking_objects_.set_output_file_path(
+        parsed_command_line().GetSwitchValuePath(
+            switches::kProfilingOutputFile));
+  }
+
   // This forces the TabCloseableStateWatcher to be created and, on chromeos,
   // register for the notifications it needs to track the closeable state of
   // tabs.