* Track window states: active, fullscreen and tabsintitlebar for each window
* Use toolbar.id and window state to store and retrieve values from cache
* Note: As each window has its own ToolbarIconColor object, the cache is not currently shared across windows
* inferFromText callers pass in a reason and associated value, which is used to update the state we track, and potentially clear out the cache
* Create new windows test directory for browser-window-specific tests like this
* Test for the ToolbarIconColor changes to avoid sync style flushes when windows activate/deactivate
* Skip test for windows 8, follow-up filed as bug 1356684
MozReview-Commit-ID: JDJ3RtL4Lge