Add a virtual beamforming audio device on ChromeOS.

content/renderer/media/mock_media_constraint_factory.cc

 // Copyright 2014 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 "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/renderer/media/mock_media_constraint_factory.h"
 #include "third_party/libjingle/source/talk/app/webrtc/mediaconstraintsinterface.h"
 
 namespace content {
 
 namespace {
 
 static const char kValueTrue[] = "true";
 static const char kValueFalse[] = "false";
 
 }  // namespace
 
 MockMediaConstraintFactory::MockMediaConstraintFactory() {
 }
 
 MockMediaConstraintFactory::~MockMediaConstraintFactory() {
 }
 
 blink::WebMediaConstraints
-MockMediaConstraintFactory::CreateWebMediaConstraints() {
+MockMediaConstraintFactory::CreateWebMediaConstraints() const {
   blink::WebVector<blink::WebMediaConstraint> mandatory(mandatory_);
   blink::WebVector<blink::WebMediaConstraint> optional(optional_);
   blink::WebMediaConstraints constraints;
   constraints.initialize(optional, mandatory);
   return constraints;
 }
 
 void MockMediaConstraintFactory::AddMandatory(const std::string& key,
                                               int value) {
   mandatory_.push_back(blink::WebMediaConstraint(base::UTF8ToUTF16(key),
@@ skipping 55 matching lines @@
       webrtc::MediaConstraintsInterface::kTypingNoiseDetection,
       webrtc::MediaConstraintsInterface::kExperimentalNoiseSuppression
   };
   MockMediaConstraintFactory factory;
   for (size_t i = 0; i < arraysize(kDefaultAudioConstraints); ++i) {
     AddMandatory(kDefaultAudioConstraints[i], false);
   }
 }
 
 }  // namespace content