* enabling firefox screenshot tests. adding to documentation

* test with correct goldens

* update goldens SHA

* change the goldens with flutter/goldens repo

* do not run preparation step twice. this will cause test_results to be deleted

[fuchsia] add intercept_all_input flag support

This change also fixes an issue where FlutterRunnerProductConfiguration
crashes when a field is missing, when building with --unopt.

Test: Added unit tests
Bug: fxb/61466, fxb/61942

Also force disposal of all hybrid platform views when shutting down the
engine.

Fixes https://github.com/flutter/flutter/issues/66764

This reverts commit 7959d80c.

- Build OCMock as a dylib for iOS tests
- Set install_name for ios_flutter_test and ocmock dylibs
- Copy and sign dylibs during build process

* Fix AltGr modifier crash
* update integration test

Adds a support for compiling flutter engine when
gdk does not have X11 backend. In such a configuration
the generated gdkconfig.h header file looks like the following:

 /* gdkconfig.h
  *
  * This is a generated file.  Please modify `configure.ac'
  */

 #ifndef __GDKCONFIG_H__
 #define __GDKCONFIG_H__

 #if !defined (__GDK_H_INSIDE__) && !defined (GDK_COMPILATION)
 #error "Only <gdk/gdk.h> can be included directly."
 #endif

 #include <glib.h>

 G_BEGIN_DECLS

 #define GDK_WINDOWING_WAYLAND

 G_END_DECLS

 #endif  /* __GDKCONFIG_H__ */

Additionally headers like <gdk/gdkx.h> are not available at all.

Above configuration can be found on the most of the embedded systems.

This patch enables compilation of X11 specific code only when gdk
defines GDK_WINDOWING_X11.
Signed-off-by: NDamian Wrobel <dwrobel@ertelnet.rybnik.pl>

* Revert "Fix documentation build for window changes. (#21780)"

This reverts commit 931a0468.

* Revert "Migration to PlatformDispatcher and multi-window (#20496)"

This reverts commit 85b0031f.

Extracts a TextRange class with a base and extent, and start(), end(),
collapsed(), and length() getters.

The possibility of reversed base and extent in selections and composing
ranges makes reasoning about them complex and increases the chances of
errors in the code. This change migrates most uses of base and extent in
the text model to start()/end() or position(). The position() method is
intended purely as an aid to readability to indicate that a collapsed
selection is expected at the call site; it also enforces a debug-time
assertion that this is the case.

The space in the argument name was causing this argument to be dropped and the sound and unsound dills to be identical.

* carrying code

* more changes for carrying the code

* rebase changes onto ios-screenshot tests

* adding screenshot capability to text_editing e2e test

* address some comments

* change enable flag for isUnitTestsScreenshotsAvailable

* addressing the reviewer comments

* change the dependency for path

* add to licencense file

* changing goldens commit no. the new commit has the screenshot goldens

* update readme file

* firefox tests needs LUCI changes

* change to release mode since screenshots were taken in release mode

* change window size

* some argument changes

* small comment change

* test the chrome linux tests again

* use roboto font instead of default font

* addressing reviewer comments

* change commit for goldens

* Fix documentation build for window changes.

* Add missing interfaces for web_ui

This reverts commit 5585ed99.

Additionally, the following _flutter.runInView deadlock is fixed.

Previously, a deadlock would occur when service protocol
_flutter.runInView is used to restart the engine wihtout tearing down
the shell: the shared mutex of the service protocol will be locked
during the restart as it's in the middle of handling a service protocol
message; if ServiceProtocol::AddHandler is also called during the
restart, the deadlock happens as AddHandler also requires such lock.

test/integration.shard/background_isolate_test.dart would fail
without this fix.

This is to unblock a Dart -> engine roll.