Avoid blocking the PNaCl translator processes when chrome NaCl GDB flag is on.

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index f11a2c4e7db93665bbb9207f5aaa53e620109901..ed88089dfc996c8c76d7259ab6098383544e5db7 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -186,12 +186,13 @@ const Experiment::Choice kOverscrollHistoryNavigationChoices[] = {
 #endif
 
 const Experiment::Choice kNaClDebugMaskChoices[] = {
-  { IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", "" },
   // Secure shell can be used on ChromeOS for forwarding the TCP port opened by
-  // debug stub to a remote machine. Since secure shell uses NaCl, we provide
-  // an option to switch off its debugging.
-  { IDS_NACL_DEBUG_MASK_CHOICE_EXCLUDE_UTILS,
-      switches::kNaClDebugMask, "!*://*/*ssh_client.nmf" },
+  // debug stub to a remote machine. Since secure shell uses NaCl, we usually
+  // want to avoid debugging that. The PNaCl translator is also a NaCl module,
+  // so by default we want to avoid debugging that (the empty string will
+  // be overridden to the expected default).
+  { IDS_NACL_DEBUG_MASK_CHOICE_EXCLUDE_UTILS_PNACL, "", "" },

[bradn, 2014/03/06 18:56:34]

Maybe pull out the stuff in parens to:
NOTE: As the default value must be the empty string, the mask excluding the
PNaCl translator and secure shell is substituted in elsewhere.

[jvoung (off chromium), 2014/03/06 19:02:51]

Done.

+  { IDS_NACL_DEBUG_MASK_CHOICE_DEBUG_ALL, switches::kNaClDebugMask, "*://*" },
   { IDS_NACL_DEBUG_MASK_CHOICE_INCLUDE_DEBUG,
       switches::kNaClDebugMask, "*://*/*debug.nmf" }
 };