[Media] Add user gesture reporting for API calls to midi and media streams.

content/public/common/media_stream_request.h

Index: content/public/common/media_stream_request.h
diff --git a/content/public/common/media_stream_request.h b/content/public/common/media_stream_request.h
index c4c838fb6e376a216a3bbc1c979896ff95ee423e..24a8798394aa93c42e941b0e19067a1b9d97a041 100644
--- a/content/public/common/media_stream_request.h
+++ b/content/public/common/media_stream_request.h
@@ -165,6 +165,7 @@ struct CONTENT_EXPORT MediaStreamRequest {
       int render_view_id,
       int page_request_id,
       const GURL& security_origin,
+      bool user_gesture,
       MediaStreamRequestType request_type,
       const std::string& requested_audio_device_id,
       const std::string& requested_video_device_id,
@@ -193,6 +194,9 @@ struct CONTENT_EXPORT MediaStreamRequest {
   // The WebKit security origin for the current request (e.g. "html5rocks.com").
   GURL security_origin;
 
+  // Set to true if the call was made in the context of a user gesture.
+  bool user_gesture;
+
   // Stores the type of request that was made to the media controller. Right now
   // this is only used to distinguish between WebRTC and Pepper requests, as the
   // latter should not be subject to user approval but only to policy check.