[SyncFS] Check DumpDatabase result before passing to JS

BUG=240165
NOTRY=true

Review URL: https://codereview.chromium.org/109893002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239436 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239436
Cache ntdll proc addresses in ELF

BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=238539

Review URL: https://codereview.chromium.org/85403005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239437 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239437