cc: fix HudLayer to be sized by device

cc: fix HudLayer to be sized by device

This change switches the HudLayer to be sized based on deviceViewPort
and deviceScaleFactor instead of layoutViewPort. This way the hudLayer's
content does not go offscreen in case --enable-fixed-layout is used.

BUG=173603
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=183623

[danakj, 2013-02-20 02:46:08]

Looks good! Some temp vars would make this nicer IMO. Let's find out if it fixes
android.

https://codereview.chromium.org/12316005/diff/1/cc/heads_up_display_layer.cc
File cc/heads_up_display_layer.cc (right):

https://codereview.chromium.org/12316005/diff/1/cc/heads_up_display_layer.cc#...
cc/heads_up_display_layer.cc:38: int width = std::min(maxTextureSize,
static_cast<int>(layerTreeHost()->deviceViewportSize().width() /
layerTreeHost()->deviceScaleFactor()));
split these "static_cast<>(dVS.width/lTH.dSF)" parts out into temp vars so they
get a name (deviceViewportInLayoutPixelsWidth|Height?) and can be reused in both
the if/else parts.

[egraether, 2013-02-20 18:45:55]

New patch uses temp vars and this fix got verified on Nexus 4 & 10.

[danakj, 2013-02-20 18:50:04]

LGTM

[commit-bot: I haz the power, 2013-02-20 18:51:50]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/egraether@chromium.org/12316005/3001

[commit-bot: I haz the power, 2013-02-20 21:26:56]

Change committed as 183623