Revert of Use has_more parameter to return entries from AsyncFileUtilAdapter (https://codereview.chromium.org/194233002/)

Reason for revert:
Broke LayoutTest/fast/filesystem/workers/read-directory-sync-many.html

FAIL [Worker] numFiles should be 150. Was 100.
FAIL [Worker] numDirectories should be 150. Was 0.

Original issue's description:
> Use has_more parameter to return entries from AsyncFileUtilAdapter
> 
> BUG=347900
> TEST=git cl try
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=256217

TBR=tzik@chromium.org,hashimoto@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=347900

Review URL: https://codereview.chromium.org/195323002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256251 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256251
Remove clearContextMenu from RenderViewImpl now that r168750 from Blink is rolled

BUG=304341
R=nasko@chromium.org

Review URL: https://codereview.chromium.org/189843013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256252 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256252