Roll src/third_party/depot_tools/ 0115c356f..b1a5e452d (3 commits; 1 trivial rolls)

https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/0115c356f675..b1a5e452d31e

$ git log 0115c356f..b1a5e452d --date=short --no-merges --format='%ad %ae %s'
2018-05-23 agable Remove Rietveld-only apply_issue
2018-05-24 agable Remove more Rietveld support from presubmit

Created with:
  roll-dep src/third_party/depot_tools
BUG=chromium:770408,chromium:770408


The AutoRoll server is located here: https://depot-tools-chromium-roll.skia.org

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


TBR=agable@chromium.org

Change-Id: I3c4783648fdd94df71a875e0444218c125cd94b6
Reviewed-on: https://chromium-review.googlesource.com/1072494
Commit-Queue: depot-tools-chromium-autoroll <depot-tools-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Reviewed-by: depot-tools-chromium-autoroll <depot-tools-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#561643}

DEPS

@@ -523,7 +523,7 @@ deps = {
   },
 
   'src/third_party/depot_tools':
-    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + '0115c356f67563d749974293d81b3adeb00b1086',
+    Var('chromium_git') + '/chromium/tools/depot_tools.git' + '@' + 'b1a5e452d31e36b9b56abaa36d8f5fd6908655a5',
 
   'src/third_party/devtools-node-modules':
     Var('chromium_git') + '/external/github.com/ChromeDevTools/devtools-node-modules' + '@' + Var('devtools_node_modules_revision'),