Use NSS for symmetric key crypto operations on Windows and Mac.

chrome/renderer/chrome_render_process_observer.cc

Index: chrome/renderer/chrome_render_process_observer.cc
diff --git a/chrome/renderer/chrome_render_process_observer.cc b/chrome/renderer/chrome_render_process_observer.cc
index 4a2a97ca6b935d005ba7d836adfef03d94f31a44..e2cc87b3dbf33bcb121629c18018ade878bbe3cd 100644
--- a/chrome/renderer/chrome_render_process_observer.cc
+++ b/chrome/renderer/chrome_render_process_observer.cc
@@ -186,7 +186,7 @@ ChromeRenderProcessObserver::ChromeRenderProcessObserver(
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && defined(USE_NSS)
-  // Remoting requires NSS to function properly.
+  // On Linux, NSS uses system libraries, so the .so's must be loaded.

[wtc, 2012/06/14 21:28:48]

Nit: this should read:
  On Linux, we use system NSS libraries, so ...

It may be better to just say "On the platforms where we use
system NSS libraries, the .so's must be loaded".  The
platforms are more than just Linux:
    defined(OS_POSIX) && !defined(OS_MACOSX)

[ddorwin, 2012/06/14 22:01:55]

Done.

   if (!command_line.HasSwitch(switches::kSingleProcess)) {
     // We are going to fork to engage the sandbox and we have not loaded
     // any security modules so it is safe to disable the fork check in NSS.