Remove dead code related to media device enumerations and monitoring.

content/renderer/pepper/pepper_media_device_manager.h

 // 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.
 
 #ifndef CONTENT_RENDERER_PEPPER_PEPPER_MEDIA_DEVICE_MANAGER_H_
 #define CONTENT_RENDERER_PEPPER_PEPPER_MEDIA_DEVICE_MANAGER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 56 matching lines @@
   void OnStreamGenerated(
       int request_id,
       const std::string& label,
       const StreamDeviceInfoArray& audio_device_array,
       const StreamDeviceInfoArray& video_device_array) override;
   void OnStreamGenerationFailed(
       int request_id,
       content::MediaStreamRequestResult result) override;
   void OnDeviceStopped(const std::string& label,
                        const StreamDeviceInfo& device_info) override;
-  void OnDevicesEnumerated(int request_id,
-                           const StreamDeviceInfoArray& device_array) override;
   void OnDeviceOpened(int request_id,
                       const std::string& label,
                       const StreamDeviceInfo& device_info) override;
   void OnDeviceOpenFailed(int request_id) override;
-  void OnDevicesChanged() override;
 
   // Stream type conversion.
   static MediaStreamType FromPepperDeviceType(PP_DeviceType_Dev type);
 
  private:
   explicit PepperMediaDeviceManager(RenderFrame* render_frame);
 
   // RenderFrameObserver implementation.
   void OnDestruct() override;
 
@@ skipping 22 matching lines @@
   OpenCallbackMap open_callbacks_;
 
   ::mojom::MediaDevicesDispatcherHostPtr media_devices_dispatcher_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperMediaDeviceManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_MEDIA_DEVICE_MANAGER_H_