Bug 5608192
Text content for content-editable fields is
retrieved and given to the WebViewInputConnection
so that suggestions will work appropriately.
Edits with WebViewInputConnection uses
replaceTextfieldText just like WebTextView.
Webkit Change: Idcf8d99d9e844669ea68122a7509990f5ce8dcca
Change-Id: I5f1fcc13a0abe204db301e027954dc47c3a48db0