Revert "[DevTools] try to reenable PauseInSharedWorkerInitialization"

This reverts commit da300b52.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> [DevTools] try to reenable PauseInSharedWorkerInitialization
> 
> WorkerDevToolsSanityTest.PauseInSharedWorkerInitialization.
> This test is passing locally.
> 
> TBR=dgozman@chromium.org
> 
> Bug: chromium:432444
> Change-Id: I854aa9d72932d788f71724e84720a6529a6b5f4a
> Reviewed-on: https://chromium-review.googlesource.com/806924
> Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#521512}

TBR=dgozman@chromium.org,kozyatinskiy@chromium.org

Change-Id: I8b9e49420c2f62a994882d05a7c6ddb8174e80a2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:432444
Reviewed-on: https://chromium-review.googlesource.com/809384Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521736}

chrome/browser/devtools/devtools_sanity_browsertest.cc

@@ -1838,8 +1838,9 @@ IN_PROC_BROWSER_TEST_F(WorkerDevToolsSanityTest, InspectSharedWorker) {
   CloseDevToolsWindow();
 }
 
+// Flaky on multiple platforms. See http://crbug.com/432444
 IN_PROC_BROWSER_TEST_F(WorkerDevToolsSanityTest,
-                       PauseInSharedWorkerInitialization) {
+                       DISABLED_PauseInSharedWorkerInitialization) {
   ASSERT_TRUE(spawned_test_server()->Start());
   GURL url = spawned_test_server()->GetURL(kReloadSharedWorkerTestPage);
   ui_test_utils::NavigateToURL(browser(), url);