Disable DevToolsExtensionTest.ExtensionWebSocketUserAgentOverride

TBR=gayane@chromium.org
NOTRY=true

Bug: 971241
Change-Id: Ib0e2541601ee7eef544ff5d5a0a9adc46f54762f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1645793Reviewed-by: Xida Chen <xidachen@chromium.org>
Commit-Queue: Xida Chen <xidachen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#666277}

chrome/browser/devtools/devtools_sanity_browsertest.cc

@@ -2395,16 +2395,9 @@ IN_PROC_BROWSER_TEST_F(SitePerProcessDevToolsSanityTest,
   DevToolsWindowTesting::CloseDevToolsWindowSync(window);
 }
 
-// Fail on chrome os. See https://crbug.com/971241
-#if defined(OS_CHROMEOS)
-#define MAYBE_ExtensionWebSocketUserAgentOverride \
-  DISABLED_ExtensionWebSocketUserAgentOverride
-#else
-#define MAYBE_ExtensionWebSocketUserAgentOverride \
-  ExtensionWebSocketUserAgentOverride
-#endif
+// See https://crbug.com/971241
 IN_PROC_BROWSER_TEST_F(DevToolsExtensionTest,
-                       ExtensionWebSocketUserAgentOverride) {
+                       DISABLED_ExtensionWebSocketUserAgentOverride) {
   net::SpawnedTestServer websocket_server(
       net::SpawnedTestServer::TYPE_WS,
       base::FilePath(FILE_PATH_LITERAL("net/data/websocket")));