Use 2x timeout for DCHECK release builds

DCHECK release builds are much slower than pure release builds.
Increasing the timeout may reduce flakiness on CQ bots which enable
DCHECK.

Bug: 1047818
Change-Id: I2dddced0787c92c0607c4c17bc3cc2dd50cd0591
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2242233
Commit-Queue: Xianzhu Wang <[email protected]>
Reviewed-by: Xianzhu Wang <[email protected]>
Reviewed-by: Dirk Pranke <[email protected]>
Reviewed-by: Robert Ma <[email protected]>
Cr-Commit-Position: refs/heads/master@{#778991}
diff --git a/BUILD.gn b/BUILD.gn
index 74e6bd3..870dd7a 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1109,6 +1109,9 @@
       "//third_party/blink/web_tests/resources/",
       "//third_party/blink/web_tests/wpt_internal/",
       "//third_party/pywebsocket3/src/mod_pywebsocket/",
+
+      # Needed by run_web_tests.py to detect DCHECK build.
+      "$root_out_dir/args.gn",
     ]
 
     if (is_win) {