Revert 272565 "Re-land: cc: Fail more visibly when sync queries ..."

Revert 272565 "Re-land: cc: Fail more visibly when sync queries ..."

Caused two native crashes in contentshell_instrumentation_tests on
Android Tests (dbg) bot on Blink waterfall.

BUG=377053, 371530, 373360
> Re-land: cc: Fail more visibly when sync queries are not working correctly.
> 
> Instead of creating an infinite number of sync queries, which will
> eventually cause performance issues, log an error message and block
> until oldest query has passed when reaching 16 pending queries.
> 
> BUG=371530, 373360
> 
> Review URL: https://codereview.chromium.org/280543003

TBR=reveman@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=272638

[Ken Russell (switch to Gerrit), 2014-05-23 23:41:43]

Committed patchset #1 manually as r272638.