Remove unnecessary local variable in RenderLayer::paintLayerContents()
Remove unnecessary local variable in RenderLayer::paintLayerContents()

At this time there are only two entry points into
RenderLayer::paintLayerContents() - (1) from the compositor,
which will not use the PaintLayerAppliedTransform flag, and
(2) from RenderLayer::paintLayerContentsAndReflection(),
which is already setting this flag and passing it along.
Removing the line of code that sets this flag redundantly in
paintLayerContents() allows us to also remove the local flag
variable, which helps when reasoning through the tricky logic
in this function.

BUG=261608

Review URL: https://chromiumcodereview.appspot.com/20801004

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@155137 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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