Add depot_tools builder to infra waterfall.

masters/master.chromium.infra/master.cfg

Index: masters/master.chromium.infra/master.cfg
diff --git a/masters/master.chromium.infra/master.cfg b/masters/master.chromium.infra/master.cfg
index a0cc37de15db764af94c00bbbf25f0b67ce54d13..d0db4a578f27f949a24d2e693736896bd4ab7896 100644
--- a/masters/master.chromium.infra/master.cfg
+++ b/masters/master.chromium.infra/master.cfg
@@ -40,6 +40,7 @@ LUCI_GO_REPO_URL = (
     'https://chromium.googlesource.com/external/github.com/luci/luci-go')
 LUCI_GAE_REPO_URL = (
     'https://chromium.googlesource.com/external/github.com/luci/gae')
+DEPOT_TOOLS_URL = 'https://chromium.googlesource.com/chromium/tools/depot_tools'
 
 c['change_source'].extend([
   gitiles_poller.GitilesPoller(
@@ -60,6 +61,12 @@ c['change_source'].extend([
     branches=['master', 'go1'],
     pollInterval=10,
     revlinktmpl=LUCI_GO_REPO_URL+'/+/%s'),
+  gitiles_poller.GitilesPoller(
+    repo_url=DEPOT_TOOLS_URL,
+    project='depot_tools',
+    branches=['master'],
+    pollInterval=10,
+    revlinktmpl=DEPOT_TOOLS_URL+'/+/%s'),
 ])
 
 ####### BUILDERS
@@ -180,6 +187,12 @@ c['builders'].extend([
     'factory': f_annotations.BaseFactory('infra/build_conda_cipd_pkg'),
     'category': 'zconda',
   },
+  {
+    'name': 'depot_tools zip uploader',
+    'slavebuilddir': 'depot_tools_uploader',
+    'factory': f_annotations.BaseFactory('infra/depot_tools_builder'),
+    'category': 'depot_tools',
+  },
 ])
 
 ####### SCHEDULERS
@@ -223,6 +236,14 @@ c['schedulers'].extend([
         'luci-go-win64',
       ]
   ),
+  AnyBranchScheduler(
+      name='depot_tools-scheduler',
+      change_filter=ChangeFilter(project=['depot_tools']),
+      treeStableTimer=1,
+      builderNames=[
+        'depot_tools zip uploader',
+      ]
+  ),
 ])
 
 ####### BUILDSLAVES