Contextual Search UI changes for custom tabs
For custom tabs, in the maximized state a tap on the search panel should not promote to a new tab. Also, a close button has been added in the maximized state.
BUG=
499502
Committed:
https://crrev.com/38bbc5a1475b346d0bd3164712737dd96d3636a2
Cr-Commit-Position: refs/heads/master@{#337948}