Update DEPS for libvpx merge.

Bug: 908827
Change-Id: Ibf23cae7e44a96753b6efc77c4d38562903c0d9f
Reviewed-on: https://chromium-review.googlesource.com/c/1357307
Reviewed-by: Michael Moss <mmoss@chromium.org>
Cr-Commit-Position: refs/branch-heads/3578@{#859}
Cr-Branched-From: 4226ddf99103e493d7afb23a4c7902ee496108b6-refs/heads/master@{#599034}
diff --git a/DEPS b/DEPS
index aee688e4..ca66ea91 100644
--- a/DEPS
+++ b/DEPS
@@ -853,7 +853,7 @@
   },
 
   'src/third_party/libvpx/source/libvpx':
-    Var('chromium_git') + '/webm/libvpx.git' + '@' +  'e188b5435de71bcd602c378f1ac0441111f0f915',
+    Var('chromium_git') + '/webm/libvpx.git' + '@' +  'e72a0b581d414cbfdcc34e043599436e3d97d7be',
 
   'src/third_party/libwebm/source':
     Var('chromium_git') + '/webm/libwebm.git' + '@' + 'e4931ebc0a816458c18a6734e91a4d1b5acd5c56',