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..5bf027fff449018b092e0bf9442bd1d6dfa9ad94 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 platforms where we use system NSS libraries, the .so's must be loaded.
   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.