Clarify the use of the term "Document" in gdata_wapi_operations.h.

Resource = Regular File + Hosted Document + Directory.
GetDoucmentEntryOperation and DeleteDocumentOperation is actually used for any resources.
CopyDocumentOperation only works for hosted documents, so making it clearer.

BUG=164538, 164090


Review URL: https://chromiumcodereview.appspot.com/11444024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@171489 0039d316-1c4b-4281-b951-d872f2087c98
4 files changed