Add trybots to default CQ for sandbox/win.

Add three bots to CQ for any changes to sandbox/win:

 * win-asan
 * win10_chromium_x64_dbg_ng
 * win7-rel

This is because any sandbox changes can be particularly sensitive
to OS version/configuration.

BUG=750886

Change-Id: I4ff315f65e220591a0835069342b51ab2549d183
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1762384Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Will Harris <wfh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#688603}

docs/infra/cq_builders.md

@@ -270,6 +270,21 @@ builder.
     * [`//third_party/blink/renderer/platform/graphics/gpu/.+`](https://cs.chromium.org/chromium/src/third_party/blink/renderer/platform/graphics/gpu/)
     * [`//ui/gl/.+`](https://cs.chromium.org/chromium/src/ui/gl/)
 
+* [win-asan](https://ci.chromium.org/p/chromium/builders/luci.chromium.try/win-asan) ([`commit-queue.cfg` entry](https://cs.chromium.org/search/?q=package:%5Echromium$+file:commit-queue.cfg+chromium/try/win-asan)) ([matching builders](https://cs.chromium.org/search/?q=file:trybots.py+win-asan))
+
+  Path regular expressions:
+    * [`//sandbox/win/.+`](https://cs.chromium.org/chromium/src/sandbox/win/)
+
+* [win10_chromium_x64_dbg_ng](https://ci.chromium.org/p/chromium/builders/luci.chromium.try/win10_chromium_x64_dbg_ng) ([`commit-queue.cfg` entry](https://cs.chromium.org/search/?q=package:%5Echromium$+file:commit-queue.cfg+chromium/try/win10_chromium_x64_dbg_ng)) ([matching builders](https://cs.chromium.org/search/?q=file:trybots.py+win10_chromium_x64_dbg_ng))
+
+  Path regular expressions:
+    * [`//sandbox/win/.+`](https://cs.chromium.org/chromium/src/sandbox/win/)
+
+* [win7-rel](https://ci.chromium.org/p/chromium/builders/luci.chromium.try/win7-rel) ([`commit-queue.cfg` entry](https://cs.chromium.org/search/?q=package:%5Echromium$+file:commit-queue.cfg+chromium/try/win7-rel)) ([matching builders](https://cs.chromium.org/search/?q=file:trybots.py+win7-rel))
+
+  Path regular expressions:
+    * [`//sandbox/win/.+`](https://cs.chromium.org/chromium/src/sandbox/win/)
+
 * [win_optional_gpu_tests_rel](https://ci.chromium.org/p/chromium/builders/luci.chromium.try/win_optional_gpu_tests_rel) ([`commit-queue.cfg` entry](https://cs.chromium.org/search/?q=package:%5Echromium$+file:commit-queue.cfg+chromium/try/win_optional_gpu_tests_rel)) ([matching builders](https://cs.chromium.org/search/?q=file:trybots.py+win_optional_gpu_tests_rel))
 
   Path regular expressions:

infra/config/commit-queue.cfg

@@ -318,6 +318,18 @@ config_groups {
         location_regexp: ".+/[+]/third_party/blink/renderer/platform/graphics/gpu/.+"
         location_regexp: ".+/[+]/ui/gl/.+"
       }
+      builders {
+        name: "chromium/try/win-asan"
+        location_regexp: ".+/[+]/sandbox/win/.+"
+      }
+      builders {
+        name: "chromium/try/win10_chromium_x64_dbg_ng"
+        location_regexp: ".+/[+]/sandbox/win/.+"
+      }
+      builders {
+        name: "chromium/try/win7-rel"
+        location_regexp: ".+/[+]/sandbox/win/.+"
+      }
       builders {
         name: "chromium/try/win_optional_gpu_tests_rel"
         location_regexp: ".+/[+]/chrome/browser/vr/.+"