Enable WebAudio by default for Android/x86.

content/browser/renderer_host/render_view_host_impl.cc

 // Copyright (c) 2012 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/browser/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 350 matching lines @@
       !command_line.HasSwitch(switches::kDisableXSLT);
   prefs.xss_auditor_enabled =
       !command_line.HasSwitch(switches::kDisableXSSAuditor);
   prefs.application_cache_enabled =
       !command_line.HasSwitch(switches::kDisableApplicationCache);
 
   prefs.local_storage_enabled =
       !command_line.HasSwitch(switches::kDisableLocalStorage);
   prefs.databases_enabled =
       !command_line.HasSwitch(switches::kDisableDatabases);
-#if defined(OS_ANDROID) && defined(ARCH_CPU_X86)
-  prefs.webaudio_enabled =
-      command_line.HasSwitch(switches::kEnableWebAudio);
-#else
+#if defined(OS_ANDROID)
+  // WebAudio is enabled by default on x86 and ARM.
   prefs.webaudio_enabled =
       !command_line.HasSwitch(switches::kDisableWebAudio);
 #endif
 
   prefs.experimental_webgl_enabled =
       GpuProcessHost::gpu_enabled() &&
       !command_line.HasSwitch(switches::kDisable3DAPIs) &&
       !command_line.HasSwitch(switches::kDisableExperimentalWebGL);
 
   prefs.pepper_3d_enabled =
@@ skipping 1543 matching lines @@
   return true;
 }
 
 void RenderViewHostImpl::AttachToFrameTree() {
   FrameTree* frame_tree = delegate_->GetFrameTree();
 
   frame_tree->ResetForMainFrameSwap();
 }
 
 }  // namespace content