Remove dead code from RenderBlockFlow.cpp

Remove unused constructTextRunInternal function from RenderBlockFlow.

TBR=dglazkov@chromium.org
BUG=

Review URL: https://codereview.chromium.org/197283029

git-svn-id: svn://svn.chromium.org/blink/trunk@169418 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove dead code in RenderText

Remove unused word width hypen code from computePreferredLogicalWidths
as it is no longer used.

TBR=leviw@chromium.org
BUG=

Review URL: https://codereview.chromium.org/195973008

git-svn-id: svn://svn.chromium.org/blink/trunk@169419 bbb929c8-8fbe-4397-9dbb-9b2b20218538