Roll openh264 to 6f26bce

Changelog
https://chromium.googlesource.com/external/github.com/cisco/openh264/+log/3b51f16a4a41df729f8d647f03e48c5f272911ff..6f26bce0b1c4e8ce0e13332f7c0083788def5fdf

BUG=893594
TBR=mflodman,hbos

Change-Id: I15409f2d1671f23fb785d63f1d3b2f1b0d4b5316
Reviewed-on: https://chromium-review.googlesource.com/c/1355253Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612440}

DEPS

@@ -982,7 +982,7 @@ deps = {
   },
 
   'src/third_party/openh264/src':
-    Var('chromium_git') + '/external/github.com/cisco/openh264' + '@' + '3b51f16a4a41df729f8d647f03e48c5f272911ff',
+    Var('chromium_git') + '/external/github.com/cisco/openh264' + '@' + '6f26bce0b1c4e8ce0e13332f7c0083788def5fdf',
 
   'src/third_party/openmax_dl':
     Var('webrtc_git') + '/deps/third_party/openmax.git' + '@' +  Var('openmax_dl_revision'),

third_party/openh264/README.chromium

@@ -2,8 +2,8 @@ Name: OpenH264
 Short Name: openh264
 URL: http://www.openh264.org/
 Version: unknown
-(Cut at 3b51f16a4a41df729f8d647f03e48c5f272911ff, which is between 1.7.0 and
-1.8.0)
+(Cut at 6f26bce0b1c4e8ce0e13332f7c0083788def5fdf, which is between 1.9.0 and
+1.10.0)
 License: 2-Clause BSD
 License File: src/LICENSE
 Security Critical: yes