Disable WebSocketBrowserTest.SendCloseFrameWhenTabIsClosed

This test is flaky, so disable it for now pending further investigation.

BUG=1113999

Change-Id: If2b4063281bbc83fc369d64dfb7b4eb342b8b39c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2349588
Auto-Submit: Adam Rice <ricea@chromium.org>
Commit-Queue: Eric Orth <ericorth@chromium.org>
Reviewed-by: Eric Orth <ericorth@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797019}

chrome/browser/net/websocket_browsertest.cc

@@ -194,7 +194,8 @@ IN_PROC_BROWSER_TEST_F(WebSocketBrowserTest, SecureWebSocketSplitRecords) {
   EXPECT_EQ("PASS", WaitAndGetTitle());
 }
 
-IN_PROC_BROWSER_TEST_F(WebSocketBrowserTest, SendCloseFrameWhenTabIsClosed) {
+IN_PROC_BROWSER_TEST_F(WebSocketBrowserTest,
+                       DISABLED_SendCloseFrameWhenTabIsClosed) {
   // Launch a WebSocket server.
   ASSERT_TRUE(ws_server_.Start());