Implement profiler log writing at shutdown

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 808877eb0ea37c13c110b7ddcbe4e2469816ff6c..0df827eb490ee63607a11e0b589dd53b8ed80ffa 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -983,6 +983,9 @@ const char kProfilingAtStart[]              = "profiling-at-start";
 // The default is chrome-profile-{pid}.
 const char kProfilingFile[]                 = "profiling-file";
 
+// Specifies a path to output profiling information at shutdown.

[jar (doing other things), 2012/02/08 20:34:37]

Please add to the comment to distinguish from the string on line 984.  Perhaps:

Specifies a path for the output of task-level-profiling, such as would can be
seen via about:profiler.

[rlarocque, 2012/02/08 23:49:44]

Done, with slightly different text.  I wanted to make it clear the output file
can be loaded into about:profiler.

+const char kProfilingOutputFile[]            = "profiling-output-file";
+
 // Controls whether profile data is periodically flushed to a file. Normally
 // the data gets written on exit but cases exist where chrome doesn't exit
 // cleanly (especially when using single-process). A time in seconds can be