TextIndicatorWindow is larger than it needs to be, especially when not bouncing

TextIndicatorWindow is larger than it needs to be, especially when not bouncing
https://bugs.webkit.org/show_bug.cgi?id=139876
<rdar://problem/19311017>

Reviewed by Sam Weinig.

* page/TextIndicator.cpp:
(WebCore::TextIndicator::wantsBounce):
(WebCore::TextIndicator::wantsContentCrossfade):
(WebCore::TextIndicator::wantsFadeIn):
* page/TextIndicator.h:
* page/mac/TextIndicatorWindow.mm:
(-[WebTextIndicatorView initWithFrame:textIndicator:margin:]):
(-[WebTextIndicatorView _animationDuration]):
(-[WebTextIndicatorView present]):
(WebCore::TextIndicatorWindow::setTextIndicator):
(-[WebTextIndicatorView _textIndicatorWantsBounce]): Deleted.
(-[WebTextIndicatorView _textIndicatorWantsContentCrossfade]): Deleted.
(-[WebTextIndicatorView _textIndicatorWantsFadeIn]): Deleted.
Move the various switches over TextIndicatorPresentationTransition into TextIndicator.
Adjust the margin; only inflate by the shadow if we're not bouncing.
If we are bouncing, fix the math to more tightly fit the bounce.
Previously we were inflating by way too much, and even when we didn't need to.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@177656 268f45cc-cd09-0410-ab3c-d52691b4dbfc