[LFC][Floating] Remove redundant FloatAvoider functions.

[LFC][Floating] Remove redundant FloatAvoider functions.
https://bugs.webkit.org/show_bug.cgi?id=189035

Reviewed by Antti Koivisto.

and move some code from FloatContext to FloatAvoider.

* layout/floats/FloatAvoider.cpp:
(WebCore::Layout::FloatAvoider::initializePosition):
(WebCore::Layout::FloatAvoider::rect const):
(WebCore::Layout::FloatAvoider::setVerticalConstraint):
(WebCore::Layout::FloatAvoider::setHorizontalConstraints):
(WebCore::Layout::FloatAvoider::resetHorizontalConstraint):
(WebCore::Layout::FloatAvoider::initialVerticalPosition const):
(WebCore::Layout::FloatAvoider::initialHorizontalPosition const):
(WebCore::Layout::FloatAvoider::rectInContainingBlock const):
(WebCore::Layout::FloatAvoider::setLeft): Deleted.
(WebCore::Layout::FloatAvoider::setTopLeft): Deleted.
(WebCore::Layout::FloatAvoider::resetVertically): Deleted.
(WebCore::Layout::FloatAvoider::resetHorizontally): Deleted.
(WebCore::Layout::FloatAvoider::topLeftInContainingBlock const): Deleted.
* layout/floats/FloatAvoider.h:
(WebCore::Layout::FloatAvoider::top const): Deleted.
(WebCore::Layout::FloatAvoider::left const): Deleted.
(WebCore::Layout::FloatAvoider::marginTop const): Deleted.
(WebCore::Layout::FloatAvoider::marginLeft const): Deleted.
(WebCore::Layout::FloatAvoider::marginBottom const): Deleted.
(WebCore::Layout::FloatAvoider::marginRight const): Deleted.
(WebCore::Layout::FloatAvoider::rectWithMargin const): Deleted.
(WebCore::Layout::FloatAvoider::setTop): Deleted.
* layout/floats/FloatingContext.cpp:
(WebCore::Layout::FloatingContext::positionForFloat const):
(WebCore::Layout::FloatingContext::floatingPosition const):
(WebCore::Layout::FloatingPair::horizontalConstraints const):
(WebCore::Layout::FloatingPair::horiztonalPosition const): Deleted.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@235423 268f45cc-cd09-0410-ab3c-d52691b4dbfc