Move blob-related code to platform/blob

Move blob-related code to platform/blob

This CL breaks a dependency from core/platform/network on core/fileapi but
moving some blob-related code into platform/blob. The DOM APIs for blobs are
still in core/fileapi, but the code that supports BlobData is now in the
platform layer and has proper dependencies.

BUG=297477
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=159918

[eseidel, 2013-10-17 18:54:14]

lgtm

Blob feels like kinda an odd concept to have down at the platform layer.  But
this is just a reflection of the reality that platform/ is for a web engine and
not for some other non-blob-knowing piece of software. :)

[commit-bot: I haz the power, 2013-10-17 19:08:01]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/abarth@chromium.org/26283005/1

[abarth-chromium, 2013-10-17 19:28:39]

On 2013/10/17 18:54:14, eseidel wrote:
> Blob feels like kinda an odd concept to have down at the platform layer.  But
> this is just a reflection of the reality that platform/ is for a web engine
and
> not for some other non-blob-knowing piece of software. :)

At this layer, "blob" is just an opaque handle to a sequence of bytes.  It makes
sense in the platform layer because you can ask the network for an opaque handle
to the HTTP response instead of the actual bytes in the response.

The Blob DOM API has a richer API and isn't in the platform layer.

[eseidel, 2013-10-17 20:13:52]

Yeah, it's just a stream or similar.  It's mostly the name which is funny.  It's
totally fine.

[commit-bot: I haz the power, 2013-10-17 20:38:52]

Failed to trigger a try job on win_layout
HTTP Error 400: Bad Request

[commit-bot: I haz the power, 2013-10-17 20:39:00]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/abarth@chromium.org/26283005/14001

[michaeln, 2013-10-17 21:34:54]

lgtm2

except for a naming nit this should be call something closer to
PlatformIndependentResourceRepresentationHandle... jk :)

[abarth-chromium, 2013-10-17 21:45:28]

On 2013/10/17 21:34:54, michaeln wrote:
> lgtm2
> 
> except for a naming nit this should be call something closer to
> PlatformIndependentResourceRepresentationHandle... jk :)

Haha

[commit-bot: I haz the power, 2013-10-17 23:13:35]

Change committed as 159918