Add HostSharedBitmapManagerClient to organize bitmaps coming from renderers.

Add HostSharedBitmapManagerClient to organize bitmaps coming from renderers.

PeerHandle() is not necessarily unique, so have a HostSharedBitmapManagerClient per renderer channel that's responsible for deleting bitmaps from renderers that die.

Committed: https://crrev.com/870d71597d1c249938627575f5d31a72992aff4d
Cr-Commit-Position: refs/heads/master@{#319001}

[jbauman, 2015-02-25 00:52:31]

jbauman@chromium.org changed reviewers:
+ piman@chromium.org

[piman, 2015-02-25 01:47:40]

The linked bug suggests the issue is in the ChannelMojo.. Should we still do
this?

[jbauman, 2015-02-25 01:49:32]

On 2015/02/25 01:47:40, piman (Very slow to review) wrote:
> The linked bug suggests the issue is in the ChannelMojo.. Should we still do
> this?

Yes, I think this is cleaner than the previous design (and as mentioned there
still may be issues later as we move to more and more namespaces).

[piman, 2015-02-25 01:50:59]

LGTM anyway

[jbauman, 2015-03-04 00:59:59]

The CQ bit was checked by jbauman@chromium.org

[commit-bot: I haz the power, 2015-03-04 01:02:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/955523005/1

[commit-bot: I haz the power, 2015-03-04 02:17:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-04 02:18:29]

Patchset 1 (id:??) landed as
https://crrev.com/870d71597d1c249938627575f5d31a72992aff4d
Cr-Commit-Position: refs/heads/master@{#319001}