Enable low-latency audio by default.

content/renderer/media/audio_renderer_impl.cc

Index: content/renderer/media/audio_renderer_impl.cc
===================================================================
--- content/renderer/media/audio_renderer_impl.cc	(revision 103113)
+++ content/renderer/media/audio_renderer_impl.cc	(working copy)
@@ -40,8 +40,8 @@
   // We are initializing only one variable and double initialization is Ok,
   // so there would not be any issues caused by CPU memory model.
   if (latency_type_ == kUninitializedLatency) {
-    if (CommandLine::ForCurrentProcess()->HasSwitch(
-        switches::kLowLatencyAudio)) {
+    if (!CommandLine::ForCurrentProcess()->HasSwitch(
+        switches::kHighLatencyAudio)) {
       latency_type_ = kLowLatency;
     } else {
       latency_type_ = kHighLatency;