Disable the new delayed load strategy for PersistentCookieStore.

I recently introduced a change which caused SQLitePersistentCookieStore to load
the cookies for one eTLD every 200ms, instead of every 0ms. That change
appeared to cause a hang during shutdown.

This CL changes the delay from 200ms back to 0ms while I investigate the hang.

BUG=436152, 448910

Review URL: https://codereview.chromium.org/844533005

Cr-Commit-Position: refs/heads/master@{#312903}

content/browser/net/sqlite_persistent_cookie_store.cc

@@ -50,7 +50,10 @@ namespace {
 // The persistent cookie store is loaded into memory on eTLD at a time. This
 // variable controls the delay between loading eTLDs, so as to not overload the
 // CPU or I/O with these low priority requests immediately after start up.
-const int kLoadDelayMilliseconds = 200;
+// TODO(erikchen): Investigate why setting this value to 200 causes hangs on
+// shut down.
+// http://crbug.com/448910
+const int kLoadDelayMilliseconds = 0;
 
 }  // namespace