Revert "[Sheriff] Disable CacheStorageManagerTest.TestErrorInitializingCache."

This reverts commit bd32f816.

Reason for revert: Reverted the CLs that appear to have introduced the flakiness.

Original change's description:
> [Sheriff] Disable CacheStorageManagerTest.TestErrorInitializingCache.
> 
> Disable CacheStorageManagerTest.TestErrorInitializingCache in Fuchsia
> (flaky).
> 
> TBR=wanderview@chromium.org
> 
> Bug: 989313
> Change-Id: I18802fc677a99b9a83fc99a356f7c02ff568d11b
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1729150
> Reviewed-by: vitaliii <vitaliii@chromium.org>
> Commit-Queue: vitaliii <vitaliii@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#682694}

TBR=vitaliii@chromium.org,wanderview@chromium.org

Change-Id: I56f467459e882d5586a3aa57c1ae8bc94ae1ead8
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 989313
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1729833Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682857}

content/browser/cache_storage/cache_storage_manager_unittest.cc

@@ -1387,13 +1387,7 @@ TEST_F(CacheStorageManagerTest, DeletedCacheIgnoredInIndex) {
   EXPECT_EQ(new_cache_size, Size(origin1_));
 }
 
-// Flakily fails on Fuchsia x64. http://crbug.com/989313
-#if defined(OS_FUCHSIA)
-#define MAYBE_TestErrorInitializingCache DISABLED_TestErrorInitializingCache
-#else
-#define MAYBE_TestErrorInitializingCache TestErrorInitializingCache
-#endif
-TEST_F(CacheStorageManagerTest, MAYBE_TestErrorInitializingCache) {
+TEST_F(CacheStorageManagerTest, TestErrorInitializingCache) {
   if (MemoryOnly())
     return;
   const GURL kFooURL("http://example.com/foo");