Show camera and microphone status indicators.

content/public/browser/media_observer.h

Index: content/public/browser/media_observer.h
diff --git a/content/public/browser/media_observer.h b/content/public/browser/media_observer.h
index c938b1c3134018aacb6234073be3474dc2210f74..091a3b7d0d0482fc3239f2a86bbf6e56bc54e001 100644
--- a/content/public/browser/media_observer.h
+++ b/content/public/browser/media_observer.h
@@ -6,6 +6,8 @@
 #define CONTENT_PUBLIC_BROWSER_MEDIA_OBSERVER_H_
 #pragma once
 
+#include "content/public/common/media_stream_request.h"
+
 namespace media {
 struct MediaLogEvent;
 }
@@ -36,6 +38,18 @@ class MediaObserver {
   virtual void OnMediaEvent(int render_process_id,
                             const media::MediaLogEvent& event) = 0;
 
+  // Called when capture devices are opened.
+  virtual void OnCaptureDevicesOpened(
+      int render_process_id,
+      int render_view_id,
+      const content::MediaStreamDevices& devices) = 0;
+
+  // Called when the opened capture devices are closed.
+  virtual void OnCaptureDevicesClosed(
+      int render_process_id,
+      int render_view_id,
+      const content::MediaStreamDevices& devices) = 0;
+
  protected:
   virtual ~MediaObserver() {}
 };