Delete (Append|Pop)IBusLookupTable.

BUG=293117

Review URL: https://chromiumcodereview.appspot.com/23549033

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224973 0039d316-1c4b-4281-b951-d872f2087c98
Add last_modified to CopyResource and MoveResource.

This CL adds last_modified to the CopyResource and MoveResource to the
DriveServiceInterface to implement preserving last modified date on Copy and
Move. The feature is only supported on Drive API v2, as GData WAPI doesn't have
such a function.

BUG=282107
TEST=Ran unit_tests

Review URL: https://chromiumcodereview.appspot.com/23591067

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224974 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224974
Tweak GC algorithm in MSE to remove the buffers after last appended first.

BUG=293408

Review URL: https://chromiumcodereview.appspot.com/23919008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224975 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224975