Handle the dual microphones and dual cameras cases. Activate the proper microphone when user activa…

chromeos/audio/audio_device.cc

Index: chromeos/audio/audio_device.cc
diff --git a/chromeos/audio/audio_device.cc b/chromeos/audio/audio_device.cc
index b77fd4effac9060d41b6221e7c3ef36ac9c9e57a..24a2a5c9b394755598584820c8b0eeebdbf05b56 100644
--- a/chromeos/audio/audio_device.cc
+++ b/chromeos/audio/audio_device.cc
@@ -186,4 +186,16 @@ std::string AudioDevice::ToString() const {
   return result;
 }
 
+bool AudioDevice::IsExternalDevice() const {
+  if (!is_for_simple_usage())
+    return false;
+
+  if (is_input) {
+    return (type != AUDIO_TYPE_INTERNAL_MIC && type != AUDIO_TYPE_FRONT_MIC &&
+            type != AUDIO_TYPE_REAR_MIC);
+  } else {
+    return (type != AUDIO_TYPE_INTERNAL_SPEAKER);
+  }
+}
+
 }  // namespace chromeos