GitLab

Instead of fetching whole drive  search result feed at once, do it incrementally, (max) 100 documents at the time.

This way we get some results sooner (while the rest of the results is being fetched), so search feels more smooth.

BUG=138274
TEST=manual

TBR=darin

Review URL: https://chromiumcodereview.appspot.com/10634020

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149995 0039d316-1c4b-4281-b951-d872f2087c98