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 3cba503b5d50559ace8b45a45954eb98c7bed446..f82b64db91e1c650d9cc6dd9cec7cdea7c1d39ce 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -1156,6 +1156,12 @@ 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.