Import Cobalt 17.180626

Includes the following patches:
  https://cobalt-review.googlesource.com/c/cobalt/+/4410
    by errong.leng@samsung.com
  https://cobalt-review.googlesource.com/c/cobalt/+/4510
    by errong.leng@samsung.com

Change-Id: I1b004854c73122c6b5ebb18b079be72a278fc837
diff --git a/src/starboard/CHANGELOG.md b/src/starboard/CHANGELOG.md
index 5fd84c7..d55e4d3 100644
--- a/src/starboard/CHANGELOG.md
+++ b/src/starboard/CHANGELOG.md
@@ -8,6 +8,12 @@
 
 **NOTE: Starboard versions 3 and below are no longer supported.**
 
+## Experimental Version
+
+A description of all changes currently in the experimental Starboard version
+can be found in the comments of the "Experimental Feature Defines" section of
+[configuration.h](configuration.h).
+
 ## Version 10
 
 ### Add support for multiple versions of ffmpeg