Remove top controls layer from cc/.

Remove top controls layer from cc/.

After danakj@ comment on the CL that added the top controls manager,
I looked into layer positioning in the browser compositor to keep it
in sync with the top controls UI widgets.

This removes the need for the top controls layer and also gets rid
of the need to pass an increased clip size to the layer tree host.

Now the renderer compositor will make the webkit size and the browser
compositor will be in charge of moving it around.

BUG=161303
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=177250

[Ted C, 2013-01-16 18:40:38]

Yay for deleting just added code.  But this thankfully allows us to not mess
around with the render layer tree.

[aruslan, 2013-01-16 18:42:05]

https://codereview.chromium.org/11967021/diff/1/cc/top_controls_manager.cc
File cc/top_controls_manager.cc (right):

https://codereview.chromium.org/11967021/diff/1/cc/top_controls_manager.cc#ne...
cc/top_controls_manager.cc:62: // TODO(tedchoc): Adjust fixed position layers as
well.
Do you need this TODO?

[Ted C, 2013-01-16 18:45:10]

https://codereview.chromium.org/11967021/diff/1/cc/top_controls_manager.cc
File cc/top_controls_manager.cc (right):

https://codereview.chromium.org/11967021/diff/1/cc/top_controls_manager.cc#ne...
cc/top_controls_manager.cc:62: // TODO(tedchoc): Adjust fixed position layers as
well.
On 2013/01/16 18:42:05, aruslan wrote:
> Do you need this TODO?

I guess that's more like a general TODO, but it most likely won't happen here. 
I'll remove this as it seems to be a general source of confusion.

[enne (OOO), 2013-01-16 18:48:18]

lgtm

[commit-bot: I haz the power, 2013-01-16 18:52:00]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tedchoc@chromium.org/11967021/6

[commit-bot: I haz the power, 2013-01-16 23:04:31]

Change committed as 177250