drive: Merge OnCacheFileUploadNeededByOperation event to OnEntryUpdatedByOperation

BUG=337083
TEST=unit_tests
R=kinaba@chromium.org

Review URL: https://codereview.chromium.org/132453006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247197 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247197