Blink cleaning: Get rid of a deprecated variant of WebFileSystem::createSnapshotFileAndReadMetadata.
Blink cleaning: Get rid of a deprecated variant of WebFileSystem::createSnapshotFileAndReadMetadata.

BUG=174200

Review URL: https://codereview.chromium.org/13977006

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@148566 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs