Import b/312293934

Third-Party Import of: https://bitbucket.org/chromiumembedded/cef/src/5563
Request Document: go/android3p
For CL Reviewers: go/android3p#cl-review
For Build Team: go/ab-third-party-imports
Bug: http://b/312293934

Change-Id: I7d6ab694698628c11ca0fd434f3e565deb22087f

This is intended for usage with frameless windows that show the standard window
buttons, where resizing the title bar height changes the button offset. Returning a
different value from CefWindowDelegate::GetTitlebarHeight and forcing a resize of
the NSWindow's theme frame (see ViewsWindow::NudgeWindow) will update the
title bar height.

To test:
1. Run `cefclient --use-views --hide-frame --show-window-buttons --url=http://tests/window`
2. Enter a new value for title bar height and click the "Set Titlebar Height" button

ThreadProfiler::CreateAndStartOnMainThread and SetMainThreadTaskRunnerImpl
should be called on the same thread.

This restores the previous default behavior for framed windows.

Frameless windows now display as expected. Default traffic light buttons can
optionally be shown at configurable vertical position. Layout respects text
direction.

`cef_basetime_now()` failed to compile if `-Wstrict-prototypes` is set in clang
or gcc.

Support loading of request tests (e.g. http://tests/other_tests) inside default
browsers created via "New window" and "New incognito window" commands.

Support chaining of proxies in WillCreateURLLoaderFactory.

Chrome is always loading the primary user profile by default, so with this
change the CEF behavior more accurately reflects reality. Incognito contexts
can still be created explicitly via CefRequestContext::CreateContext.

Prior to this change, the default for the global context was an Incognito
profile based on the primary user profile. That caused request interception
to be bypassed in WillCreateURLLoaderFactory for profiles associated with
the "New window" and "New incognito window" commands. Those profiles, while
also being (or based on) the primary user profile, did not match the specific
Incognito profile assigned to the default global context.

After this change, the "New window" and "New incognito window" commands will
match the default global context when executed on a browser that was created
using the primary user profile.

Fixes InvalidStateError: Failed to execute 'getDisplayMedia' on 'MediaDevices':
getDisplayMedia() requires transient activation (user gesture).

The CefSettings cookie scheme configuration will now only impact the global
request context. Custom behavior for other request contexts must now be
configured via CefRequestContextSettings.