Revert "Replace removed NARROW_COLUMNS layout mode with TEXT_AUTOSIZING"

Not compatible with legacy webview

This reverts commit a31cfea37c3892f68807d2df52c9d482e9e1f8f6.

Change-Id: I72ad955fe67ac284976fc4927dc2f3b2ddc0d9ba
Revert "Reimplement titlebar autohiding to be compatible with chromium webview."

This reverts commit 1d379d38962ea0c00e4718cdd753806f2a6e0a60.
variant-ize browser

Change-Id: Iff2258fadc225c1b80f55542512524daa012efcb