MediaPerceptionPrivate API impl and testing.

chromeos/dbus/proto/media_perception.proto

 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package mri;
 
 // The output of the media analytics process. Implicitly tied to the
 // MediaPerception dictionary defined in Chromium source at
 // src/extensions/common/api/media_perception_private.idl for the
 // Chromium mediaPerceptionPrivate API. This .proto needs to be compatible
@@ skipping 13 matching lines @@
 
 // Used to transmit a history of image frames and their associated annotations.
 // This is accumulated over time by the graph runner.
 message Diagnostics {
   repeated PerceptionSample perception_sample = 1;
 }
 
 message State {
   enum Status {
     STATUS_UNSPECIFIED = 0;  // Unused required default value for Proto enums.
-    TIMEOUT = 1;             // Unable to reach media analysis process.

[tbarzic, 2017/05/18 19:28:01]

Do you have to do this?

Even if it's unused, it's weird to see status value jump from 0 to 2.

[Luke Sorenson, 2017/05/18 21:24:17]

Sorry, forgot to adjust the numbers as well. Making this proto match the google3
version.

     UNINITIALIZED = 2;  // Media analytics working on loading configuration.
     STARTED = 3;        // Analysis process running but not recieving frames.
     RUNNING = 4;        // Analysis process running and injesting frames.
     SUSPENDED = 5;      // Media analytics process waiting to be started.
   }
 
   // Note: RUNNING and SUSPENDED are the only two states which should be sent to
   // SetState.
   optional Status status = 1;
 
@@ skipping 68 matching lines @@
 }
 
 message Point {
   // x represents the horizontal distance from the top left corner of the image
   // to the point.
   optional float x = 1;
   // y represents the vertical distance from the top left corner of the image to
   // the point.
   optional float y = 2;
 }