Enable MacAudioInput tests on all mac bots.

media/audio/mac/audio_low_latency_input_mac_unittest.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 "base/basictypes.h"
 #include "base/environment.h"
 #include "base/test/test_timeouts.h"
 #include "base/threading/platform_thread.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_manager_base.h"
@@ skipping 74 matching lines @@
 };
 
 class MacAudioInputTest : public testing::Test {
  protected:
   MacAudioInputTest() : audio_manager_(AudioManager::Create()) {}
   virtual ~MacAudioInputTest() {}
 
   // Convenience method which ensures that we are not running on the build
   // bots and that at least one valid input device can be found.
   bool CanRunAudioTests() {
-    scoped_ptr<base::Environment> env(base::Environment::Create());
-    if (env->HasVar("CHROME_HEADLESS"))
-      return false;
-    return audio_manager_->HasAudioInputDevices();
+    bool has_input = audio_manager_->HasAudioInputDevices();
+    if (!has_input)
+      LOG(WARNING) << "No input devices detected";
+    return has_input;
   }
 
   // Convenience method which creates a default AudioInputStream object using
   // a 10ms frame size and a sample rate which is set to the hardware sample
   // rate.
   AudioInputStream* CreateDefaultAudioInputStream() {
     int fs = static_cast<int>(AUAudioInputStream::HardwareSampleRate());
     int samples_per_packet = fs / 100;
     AudioInputStream* ais = audio_manager_->MakeAudioInputStream(
         AudioParameters(AudioParameters::AUDIO_PCM_LOW_LATENCY,
@@ skipping 180 matching lines @@
   fprintf(stderr, "               Sample rate: %d\n", fs);
   WriteToFileAudioSink file_sink(file_name);
   fprintf(stderr, "               >> Speak into the mic while recording...\n");
   ais->Start(&file_sink);
   base::PlatformThread::Sleep(TestTimeouts::action_timeout_ms());
   ais->Stop();
   fprintf(stderr, "               >> Recording has stopped.\n");
   ais->Close();
 }