Revert 220418 "cc: Block commit on activate by setting a flag on..."

Revert 220418 "cc: Block commit on activate by setting a flag on..."

http://build.chromium.org/p/chromium.linux/builders/Android%20Tests%20%28dbg%29/builds/14025/steps/cc_unittests/logs/stdio#failure7

> cc: Block commit on activate by setting a flag on LayerTreeHost.
> 
> Currently the ThreadProxy recursively asks all layers in the tree if
> they should block the commit. This is problematic as when you remove
> a layer from a the tree, it may want to block the commit to get back
> resources from its active-tree impl-layer.
> 
> Instead, have layers call SetNextCommitWaitsForActivation() when they
> want the next commit to block on activate. This way we only block
> commits that matter, not every commit when there's a texture layer
> present. And we can allow a layer to block the commit when it is
> leaving the tree.
> 
> Tests:
> TextureLayerNoMailboxIsActivatedDuringCommit
> TextureLayerMailboxIsActivatedDuringCommit
> DelegatedFrameIsActivatedDuringCommit
> 
> R=enne, piman
> BUG=277953
> 
> Review URL: https://chromiumcodereview.appspot.com/23530003

TBR=danakj@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=220455

[danakj, 2013-08-30 00:44:01]

Committed patchset #1 manually as r220455.