Add defensive code for now to RenderLayerRepainter to prevent squashing crashes

Add defensive code for now to RenderLayerRepainter to prevent squashing crashes
when removing certain kinds of layers.

BUG=370410
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=173659

[abarth-chromium, 2014-05-08 16:59:34]

LGTM

https://codereview.chromium.org/270903002/diff/1/Source/core/rendering/Render...
File Source/core/rendering/RenderLayerRepainter.cpp (right):

https://codereview.chromium.org/270903002/diff/1/Source/core/rendering/Render...
Source/core/rendering/RenderLayerRepainter.cpp:212: if (RenderLayer* layer =
m_renderer.layer()) {
I don't think it's worth null checking m_renderer.layer().  We dereference that
constantly without a null check.

[chrishtr, 2014-05-08 17:02:23]

https://codereview.chromium.org/270903002/diff/1/Source/core/rendering/Render...
File Source/core/rendering/RenderLayerRepainter.cpp (right):

https://codereview.chromium.org/270903002/diff/1/Source/core/rendering/Render...
Source/core/rendering/RenderLayerRepainter.cpp:212: if (RenderLayer* layer =
m_renderer.layer()) {
On 2014/05/08 16:59:34, abarth wrote:
> I don't think it's worth null checking m_renderer.layer().  We dereference
that
> constantly without a null check.

Done.

[chrishtr, 2014-05-08 17:02:34]

The CQ bit was checked by chrishtr@chromium.org

[commit-bot: I haz the power, 2014-05-08 17:03:24]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/chrishtr@chromium.org/270903002/20001

[commit-bot: I haz the power, 2014-05-08 18:18:01]

Change committed as 173659