Remove device enumeration, caching and monitoring from MediaStreamManager.

content/browser/renderer_host/media/audio_input_device_manager.h

Index: content/browser/renderer_host/media/audio_input_device_manager.h
diff --git a/content/browser/renderer_host/media/audio_input_device_manager.h b/content/browser/renderer_host/media/audio_input_device_manager.h
index 0f58242f75d2f758ab24e9986599ea52276daae5..fb034b0325678ec24a3302fac311025e1d8b5fb6 100644
--- a/content/browser/renderer_host/media/audio_input_device_manager.h
+++ b/content/browser/renderer_host/media/audio_input_device_manager.h
@@ -14,6 +14,7 @@
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEVICE_MANAGER_H_
 
 #include <map>
+#include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ -23,7 +24,6 @@
 #include "content/common/content_export.h"
 #include "content/common/media/media_stream_options.h"
 #include "content/public/common/media_stream_request.h"
-#include "media/audio/audio_device_name.h"
 
 namespace media {
 class AudioManager;
@@ -51,13 +51,9 @@ class CONTENT_EXPORT AudioInputDeviceManager : public MediaStreamProvider {
   void Register(MediaStreamProviderListener* listener,
                 const scoped_refptr<base::SingleThreadTaskRunner>&
                     device_task_runner) override;
-  void EnumerateDevices(MediaStreamType stream_type) override;
   int Open(const StreamDeviceInfo& device) override;
   void Close(int session_id) override;
 
-  void UseFakeDevice();
-  bool ShouldUseFakeDevice() const;
-
 #if defined(OS_CHROMEOS)
   // Registers and unregisters that a stream using keyboard mic has been opened
   // or closed. Keeps count of how many such streams are open and activates and
@@ -70,23 +66,12 @@ class CONTENT_EXPORT AudioInputDeviceManager : public MediaStreamProvider {
 #endif
 
  private:
-  // Used by the unittests to get a list of fake devices.
-  friend class MediaStreamDispatcherHostTest;
-  void GetFakeDeviceNames(media::AudioDeviceNames* device_names);
-
   typedef std::vector<StreamDeviceInfo> StreamDeviceList;
   ~AudioInputDeviceManager() override;
 
-  // Enumerates audio input devices on media stream device thread.
-  void EnumerateOnDeviceThread(MediaStreamType stream_type);
   // Opens the device on media stream device thread.
   void OpenOnDeviceThread(int session_id, const StreamDeviceInfo& info);
 
-  // Callback used by EnumerateOnDeviceThread(), called with a list of
-  // enumerated devices on IO thread.
-  void DevicesEnumeratedOnIOThread(
-      MediaStreamType stream_type,
-      std::unique_ptr<StreamDeviceInfoArray> devices);
   // Callback used by OpenOnDeviceThread(), called with the session_id
   // referencing the opened device on IO thread.
   void OpenedOnIOThread(int session_id, const StreamDeviceInfo& info);
@@ -109,7 +94,6 @@ class CONTENT_EXPORT AudioInputDeviceManager : public MediaStreamProvider {
   // Only accessed on Browser::IO thread.
   MediaStreamProviderListener* listener_;
   int next_capture_session_id_;
-  bool use_fake_device_;
   StreamDeviceList devices_;
 
 #if defined(OS_CHROMEOS)