Tab Search: Re-enable tests for Win 7

Re-enable previously flaky tests that were fixed in crbug 1148061 with
CL: https://chromium-review.googlesource.com/c/chromium/src/+/2538150

Bug: 1152287
Change-Id: Icce97515a7c8a113aae8f91102db74a6c79cb071
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2567504Reviewed-by: Thomas Lukaszewicz <tluk@chromium.org>
Commit-Queue: Roman Arora <romanarora@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832597}

chrome/test/data/webui/tab_search/tab_search_browsertest.js

@@ -40,14 +40,7 @@ var TabSearchAppTest = class extends TabSearchBrowserTest {
   }
 };
 
-// Disabled on Windows because of random crash on Win 7 Tests x64 (1).
-// See: https://crbug.com/1152287
-GEN('#if defined(OS_WIN)');
-GEN('#define MAYBE_All DISABLED_All');
-GEN('#else');
-GEN('#define MAYBE_All All');
-GEN('#endif');
-TEST_F('TabSearchAppTest', 'MAYBE_All', function() {
+TEST_F('TabSearchAppTest', 'All', function() {
   mocha.run();
 });