Enable low-latency audio by default.

content/renderer/media/audio_renderer_impl.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/audio_renderer_impl.h"
 
 #include <math.h>
 
 #include <algorithm>
 
@@ skipping 22 matching lines @@
       shared_memory_size_(0),
       stopped_(false),
       pending_request_(false),
       prerolling_(false),
       preroll_bytes_(0) {
   filter_ = RenderThread::current()->audio_message_filter();
   // Figure out if we are planning to use high or low latency code path.
   // 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;
     }
   }
 }
 
 AudioRendererImpl::~AudioRendererImpl() {
 }
 
@@ skipping 431 matching lines @@
     media::SetActualDataSizeInBytes(shared_memory_.get(),
                                     shared_memory_size_,
                                     size);
     UpdateEarliestEndTime(size, request_delay, time_now);
   }
 }
 
 void AudioRendererImpl::Send(IPC::Message* message) {
   filter_->Send(message);
 }