Enable Web Audio API by default (no longer needs enable flag).

chrome/browser/tab_contents/render_view_host_delegate_helper.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 "chrome/browser/tab_contents/render_view_host_delegate_helper.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/string_util.h"
@@ skipping 276 matching lines @@
     web_prefs.xss_auditor_enabled =
         !command_line.HasSwitch(switches::kDisableXSSAuditor);
     web_prefs.application_cache_enabled =
         !command_line.HasSwitch(switches::kDisableApplicationCache);
 
     web_prefs.local_storage_enabled =
         !command_line.HasSwitch(switches::kDisableLocalStorage);
     web_prefs.databases_enabled =
         !command_line.HasSwitch(switches::kDisableDatabases);
     web_prefs.webaudio_enabled =
-        command_line.HasSwitch(switches::kEnableWebAudio);
+        !command_line.HasSwitch(switches::kDisableWebAudio);
     web_prefs.experimental_webgl_enabled =
         gpu_enabled() &&
         !command_line.HasSwitch(switches::kDisable3DAPIs) &&
         !prefs->GetBoolean(prefs::kDisable3DAPIs) &&
         !command_line.HasSwitch(switches::kDisableExperimentalWebGL);
     web_prefs.gl_multisampling_enabled =
         !command_line.HasSwitch(switches::kDisableGLMultisampling);
     web_prefs.site_specific_quirks_enabled =
         !command_line.HasSwitch(switches::kDisableSiteSpecificQuirks);
     web_prefs.allow_file_access_from_file_urls =
@@ skipping 88 matching lines @@
   DictionaryPrefUpdate update(profile->GetPrefs(),
                               prefs::kWebKitInspectorSettings);
   DictionaryValue* inspector_settings = update.Get();
   inspector_settings->SetWithoutPathExpansion(key,
                                               Value::CreateStringValue(value));
 }
 
 void RenderViewHostDelegateHelper::ClearInspectorSettings(Profile* profile) {
   profile->GetPrefs()->ClearPref(prefs::kWebKitInspectorSettings);
 }