Add a flag to print the handles held by a child process when it shuts down.

content/common/content_switches.cc

Index: content/common/content_switches.cc
===================================================================
--- content/common/content_switches.cc	(revision 88440)
+++ content/common/content_switches.cc	(working copy)
@@ -407,6 +407,15 @@
 // Causes the process to run as a renderer zygote.
 const char kZygoteProcess[]                 = "zygote";
 
+#if defined(OS_WIN)
+// Enumerates and prints a child process' most dangerous handles when it
+// is terminated.
+const char kAuditHandles[]                  = "enable-handle-auditing";
+
+// The same as kAuditHandles except all handles are enumerated.
+const char kAuditAllHandles[]               = "enable-handle-auditing-all";
+#endif
+
 #if defined(ENABLE_P2P_APIS)
 // Enable Pepper and JavaScript P2P API.
 const char kEnableP2PApi[]                  = "enable-p2papi";