Remove use of CoreAudioUtil::IsSupported() from AudioManager startup.

content/browser/renderer_host/media/audio_input_device_manager_unittest.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 <string>
 
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
+#include "base/synchronization/waitable_event.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/browser/renderer_host/media/audio_input_device_manager.h"
 #include "content/public/common/media_stream_request.h"
 #include "media/audio/audio_manager_base.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using testing::_;
 using testing::InSequence;
 using testing::SaveArg;
@@ skipping 28 matching lines @@
     return audio_manager_->HasAudioInputDevices();
   }
 
  protected:
   virtual void SetUp() OVERRIDE {
     // The test must run on Browser::IO.
     message_loop_.reset(new base::MessageLoopForIO);
     io_thread_.reset(new BrowserThreadImpl(BrowserThread::IO,
                                            message_loop_.get()));
     audio_manager_.reset(media::AudioManager::CreateForTesting());
+    // Wait for audio thread initialization to complete.  Otherwise the
+    // enumeration type may not have been set yet.
+    base::WaitableEvent event(false, false);
+    audio_manager_->GetTaskRunner()->PostTask(FROM_HERE, base::Bind(
+        &base::WaitableEvent::Signal, base::Unretained(&event)));
+    event.Wait();
     manager_ = new AudioInputDeviceManager(audio_manager_.get());
     audio_input_listener_.reset(new MockAudioInputDeviceManagerListener());
     manager_->Register(audio_input_listener_.get(),
                        message_loop_->message_loop_proxy().get());
 
     // Gets the enumerated device list from the AudioInputDeviceManager.
     manager_->EnumerateDevices(MEDIA_DEVICE_AUDIO_CAPTURE);
     EXPECT_CALL(*audio_input_listener_,
                 DevicesEnumerated(MEDIA_DEVICE_AUDIO_CAPTURE, _))
         .Times(1)
@@ skipping 213 matching lines @@
   DCHECK(!info);
 
   manager_->Close(session_id);
   EXPECT_CALL(*audio_input_listener_,
               Closed(MEDIA_DEVICE_AUDIO_CAPTURE, session_id))
       .Times(1);
   message_loop_->RunUntilIdle();
 }
 
 }  // namespace content