To be implemented later, but adding now so googledrive's blob storage implementation
can depend on them.
Change-Id: Ief374e8592bd696c79aa2b80ded11e301063750b
Add blobserver.EnumerateAllFrom, make S3 client API match the underlying S3 protocol
with marker instead of after, and then push after->marker conversion logic up
into the s3 enumerate code that's using the S3 client.
Change-Id: I034a7c1c8af441881ebba74bcb523bd690cd16d3
Will eventually be plumbed through lots of APIs, especially those requiring or benefiting from
cancelation notification and/or those needing access to the HTTP context (e.g. App Engine).
Change-Id: I591496725d620126e09d49eb07cade7707c7fc64
Move up a layer to the HTTP. Also, start to remove ContextWrapper
stuff. We've done it differently for App Engine instead, and will do
it differently yet moving forward.
Also add blobserver.Receive and use it in most places, moving checksum
verification up a layer.
Bunch of other cleanup and TODO fixing too.
Much simpler and cleaner.
Change-Id: I12e56c5d4e53bfcf82bdd8fb0b6d57c248ff605c