[Extensions] Re-enable a test that is no longer flaky.

The AppApiTest.ReloadAfterAppCrash was disabled for flakiness many
years ago. It is no longer flaky.

Bug: 118502
Change-Id: I395ec6821ecb2fe46c82066ba5d5498eaa628ef2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2145936Reviewed-by: Kelvin Jiang <kelvinjiang@chromium.org>
Commit-Queue: David Bertoni <dbertoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#762513}

chrome/browser/extensions/app_process_apitest.cc

@@ -725,13 +725,7 @@ IN_PROC_BROWSER_TEST_F(AppApiTest, OpenWebPopupFromWebIframe) {
   EXPECT_TRUE(process_map->Contains(popup_process->GetID()));
 }
 
-// http://crbug.com/118502
-#if defined(OS_MACOSX) || defined(OS_LINUX)
-#define MAYBE_ReloadAppAfterCrash DISABLED_ReloadAppAfterCrash
-#else
-#define MAYBE_ReloadAppAfterCrash ReloadAppAfterCrash
-#endif
-IN_PROC_BROWSER_TEST_F(AppApiTest, MAYBE_ReloadAppAfterCrash) {
+IN_PROC_BROWSER_TEST_F(AppApiTest, ReloadAppAfterCrash) {
   extensions::ProcessMap* process_map =
       extensions::ProcessMap::Get(browser()->profile());