Don't require an argument for --style-lazy-parsing.

Change-Id: Ib881ecdeab2ba288c57a9bce61bd74808c33be06
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5640175
Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
Commit-Queue: Steinar H Gunderson <sesse@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1316951}
diff --git a/third_party/blink/renderer/core/css/style_perftest.cc b/third_party/blink/renderer/core/css/style_perftest.cc
index 988a273..f4d28af 100644
--- a/third_party/blink/renderer/core/css/style_perftest.cc
+++ b/third_party/blink/renderer/core/css/style_perftest.cc
@@ -86,8 +86,7 @@
       parse_iterations_str.empty() ? 1 : stoi(parse_iterations_str);
 
   const CSSDeferPropertyParsing defer_property_parsing =
-      base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
-          "style-lazy-parsing") != ""
+      base::CommandLine::ForCurrentProcess()->HasSwitch("style-lazy-parsing")
           ? CSSDeferPropertyParsing::kYes
           : CSSDeferPropertyParsing::kNo;