Pass camera facing to WebKit

third_party/WebKit/public/platform/WebMediaStreamTrack.h

Index: third_party/WebKit/public/platform/WebMediaStreamTrack.h
diff --git a/third_party/WebKit/public/platform/WebMediaStreamTrack.h b/third_party/WebKit/public/platform/WebMediaStreamTrack.h
index d9191b721badcf0e80afb731e5014a181312a689..d531fbb760aa246efa2db2721f250de6eefc3882 100644
--- a/third_party/WebKit/public/platform/WebMediaStreamTrack.h
+++ b/third_party/WebKit/public/platform/WebMediaStreamTrack.h
@@ -42,6 +42,8 @@ class WebString;
 class WebMediaStreamTrack {
  public:
   struct Settings {
+    // TODO(hta): b/34118695. Consider to rename it to FacingMode.
+    enum VideoFacingMode { User, Environment, Left, Right };
     bool hasFrameRate() { return frameRate >= 0.0; }
     bool hasWidth() { return width >= 0; }
     bool hasHeight() { return height >= 0; }
@@ -51,6 +53,7 @@ class WebMediaStreamTrack {
     long width = -1;
     long height = -1;
     WebString deviceId;
+    VideoFacingMode facingMode = VideoFacingMode::User;
   };
 
   class TrackData {