Promote linux-chromeos-compile-dbg to fully-blocking CQ bot.

R=dpranke, jbudorick

Bug: 902468
Change-Id: Id7e4909528758fd24a22e00696e905346a06b950
Reviewed-on: https://chromium-review.googlesource.com/c/1352267Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611371}

docs/infra/cq_builders.md

@@ -46,6 +46,8 @@ These builders must pass before a CL may land.
 
 * [linux-chromeos-rel](https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux-chromeos-rel) ([`cq.cfg` entry](https://cs.chromium.org/search/?q=package:%5Echromium$+file:cq.cfg+linux-chromeos-rel)) ([matching builders](https://cs.chromium.org/search/?q=file:trybots.py+linux-chromeos-rel))
 
+* [linux-chromeos-compile-dbg](https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux-chromeos-compile-dbg) ([`cq.cfg` entry](https://cs.chromium.org/search/?q=package:%5Echromium$+file:cq.cfg+linux-chromeos-compile-dbg)) ([matching builders](https://cs.chromium.org/search/?q=file:trybots.py+linux-chromeos-compile-dbg))
+
 * [linux-jumbo-rel](https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux-jumbo-rel) ([`cq.cfg` entry](https://cs.chromium.org/search/?q=package:%5Echromium$+file:cq.cfg+linux-jumbo-rel)) ([matching builders](https://cs.chromium.org/search/?q=file:trybots.py+linux-jumbo-rel))
 
 * [linux-libfuzzer-asan-rel](https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux-libfuzzer-asan-rel) ([`cq.cfg` entry](https://cs.chromium.org/search/?q=package:%5Echromium$+file:cq.cfg+linux-libfuzzer-asan-rel)) ([matching builders](https://cs.chromium.org/search/?q=file:trybots.py+linux-libfuzzer-asan-rel))
@@ -243,10 +245,6 @@ as required builders.
 
   * Experimental percentage: 10
 
-* [linux-chromeos-compile-dbg](https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux-chromeos-compile-dbg) ([`cq.cfg` entry](https://cs.chromium.org/search/?q=package:%5Echromium$+file:cq.cfg+linux-chromeos-compile-dbg)) ([matching builders](https://cs.chromium.org/search/?q=file:trybots.py+linux-chromeos-compile-dbg))
-
-  * Experimental percentage: 100
-
 * [linux-dcheck-off-rel](https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux-dcheck-off-rel) ([`cq.cfg` entry](https://cs.chromium.org/search/?q=package:%5Echromium$+file:cq.cfg+linux-dcheck-off-rel)) ([matching builders](https://cs.chromium.org/search/?q=file:trybots.py+linux-dcheck-off-rel))
 
   https://crbug.com/833482

infra/config/branch/cq.cfg

@@ -77,6 +77,7 @@ verifiers {
       builders { name: "fuchsia_x64" }
       builders { name: "ios-simulator" }
       builders { name: "linux-chromeos-rel" }
+      builders { name: "linux-chromeos-compile-dbg" }
       builders { name: "linux-jumbo-rel" }
       builders { name: "linux-libfuzzer-asan-rel" }
       builders { name: "linux-ozone-rel" }
@@ -224,10 +225,6 @@ verifiers {
         name: "ios-simulator-xcode-clang"
         experiment_percentage: 10
       }
-      builders {
-        name: "linux-chromeos-compile-dbg"
-        experiment_percentage: 100
-      }
       # https://crbug.com/833482
       builders {
         name: "linux-dcheck-off-rel"