Disable a ClipboardHistoryWithMultiProfileBrowserTest.

The newly added ShouldPasteHistoryAsPlainText test case is flaky.

Bug: 1116530
Change-Id: I75897352152844220ffbc3fbc0e27007d650ca29
Tbr: dmblack@google.com
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2357050Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: David Black <dmblack@google.com>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798206}

chrome/browser/ui/ash/clipboard_history_browsertest.cc

@@ -352,8 +352,9 @@ IN_PROC_BROWSER_TEST_F(ClipboardHistoryWithMultiProfileBrowserTest,
   Release(ui::KeyboardCode::VKEY_COMMAND);
 }
 
+// Disabled for being flaky. crbug.com/1116530
 IN_PROC_BROWSER_TEST_F(ClipboardHistoryWithMultiProfileBrowserTest,
-                       ShouldPasteHistoryAsPlainText) {
+                       DISABLED_ShouldPasteHistoryAsPlainText) {
   LoginUser(account_id1_);
 
   // Create a browser and cache its active web contents.