[Android] Set the PowerSaveBlocker's View to have zero dimensions

[Android] Set the PowerSaveBlocker's View to have zero dimensions

Currently the View created by PowerSaveBlocker has the same size as the parent
view. This is not acceptable at least for WebView applications, since such a
View can interfere with application logic in case when the application maintains
its own child Views for WebView.

The view must be visible (otherwise, KeepScreenOn has no effect), but we can
set it to have zero dimensions, thus minimizing interference.

BUG=270903, 386087
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=278505

[mnaganov (inactive), 2014-06-19 07:24:51]

Ben, ping? It's just one line.

[benm (inactive), 2014-06-19 09:23:58]

lgtm

[mnaganov (inactive), 2014-06-19 09:32:42]

Hi Marcus, would you mind doing an OWNER's review?

[bulach, 2014-06-19 16:46:10]

lgtm, thanks!

[mnaganov (inactive), 2014-06-19 16:48:43]

The CQ bit was checked by mnaganov@chromium.org

[commit-bot: I haz the power, 2014-06-19 16:54:46]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mnaganov@chromium.org/340763004/1

[commit-bot: I haz the power, 2014-06-19 22:16:18]

Change committed as 278505