Change audio renderer to communicate with host using low latency codepath.

content/common/content_switches.cc

Index: content/common/content_switches.cc
===================================================================
--- content/common/content_switches.cc	(revision 91508)
+++ content/common/content_switches.cc	(working copy)
@@ -270,6 +270,10 @@
 // Make plugin processes log their sent and received messages to VLOG(1).
 const char kLogPluginMessages[]             = "log-plugin-messages";
 
+// Uses low-latency IPC for audio.
+// That is temporary until we make it default and remove old code path.
+const char kLowLatencyAudio[]               = "enable-low-latency-audio";
+
 // Causes the process to run as a NativeClient broker
 // (used for launching NaCl loader processes on 64-bit Windows).
 const char kNaClBrokerProcess[]             = "nacl-broker";