Quota: Wire up between QuotaReservationManager and FileSystemContext

This change includes:
- Wiring up between QuotaReservationManager and FileSystemContext
- Adding a new interface into FileSystemQuotaUtil
- Exposing FileSystemContext::CreateQuotaReservationOnFileTaskRunner
as an entry point of the quota reservation.


BUG=303443
TEST=n/a

Review URL: https://codereview.chromium.org/66173003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234559 0039d316-1c4b-4281-b951-d872f2087c98
Revert 234500 "DevTools: unflake sanity tests."

These tests flaked shortly after this change was submitted.  (By flaked, 
I mean they initially passed on some bots, then failed a bit later, and 
that latter failure time had no obvious cause.)

http://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%282%29/builds/18604
http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20Chromium&testType=browser_tests&tests=DevToolsSanityTest.TestShowScriptsTab,DevToolsExtensionTest.TestContentScriptIsPresent

> DevTools: unflake sanity tests.
> 
> BUG=315288
> 
> TBR=vsevik
> 
> Review URL: https://codereview.chromium.org/61683003

TBR=pfeldman@chromium.org

Review URL: https://codereview.chromium.org/70273003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234560 0039d316-1c4b-4281-b951-d872f2087c98
Split building input for AutomaticProfileResetter's evaluation program into multiple, smaller chunks.

BUG=298036

Review URL: https://codereview.chromium.org/66723013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234561 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 234561