This reverts commit cfc2b0cd.

The include paths for GL headers in mojo/public are busted

Previously we would error out because of a lack of positional arguments.

This reverts commit 92fdf25d.

This breaks the android x86 build:

gn gen --check in out/android_debug_x64
ERROR at //mojo/public/tools/BUILD.gn:59:9: Assertion failed.
        assert(current_cpu == "arm",
        ^-----
Only arm version prebuilt netowrk_service.mojo is available.
step returned non-zero exit code: 1

If the platform requests setting up the resource context without making the context current, don’t attempt to create the GL native interface. (#3059)

See https://github.com/flutter/flutter/issues/4478

Extract a common interface out of GaneshCanvas (into GPUCanvas) that can also be used for the Vulkan canvas. (#3058)

* Namespaces have been updated to reflect the move from //flutter/sky/shell to //flutter/shell.
* shell/BUILD.gn file has been split into smaller GN files for each subcomponent of the shell (common, GPU, diagnostic, testing).
* GN dependencies have been rewritten to stop exposing common shell dependencies as public. Duplicates have also been removed.
* GPU subcomponent has been updated make it more suitable for Vulkan integration.
* The GLFW backend has been resurrected.

The new boot sequence on Fuchsia now gives us the more accurate RGB_x888 pixel
format, which we should support. Also finish pushing pixels to the screen
before drawing new pixels.

This patch depends on another patch that hasn't landed yet.

This reverts commit 960da66f.

* Wire up to mojo::tracing::* infrastructure.

* Initialize tracing as early as possible.

* Make dependency specific to fuchsia.

Originally, this was a step that had to be carried out manually. Presumably because we did not want developers to download the Android SDK and NDK if they were not targetting Android. In practice, this is rarely the case. Even the buildbots unconditionally run the script (though they don’t need Android artifacts on the Mac since there is no Mac to Android builder).

This adds media.dart which was omitted from flutter_services and fixes
incorrectly generated copyright headers to reflect the current year.

Make the creation of VulkanWindow platform agnostic by refactoring out Android specific surface creation routines. (#3048)

This adds a flutter_services package responsible for exposing the Dart
interfaces exported by the engine in a uniform fashion, regardless of
how and where the generated code for the interfaces are organized.

Sometimes it is convenient to construct a color from an opacity rather than an
alpha value.

Fixes https://github.com/flutter/flutter/issues/5205

Apparently Skia would like to remove these enum values.

Fixes https://github.com/flutter/flutter/issues/5912

We need to block in the surfaceChanged callback until we can swap the GL
surface with some content in order to avoid flashing transparent and then
black.

Fixes https://github.com/flutter/flutter/issues/5373

Previously we were swapping the wrong color channels. This change makes it
correct.

This patch makes three API changes:

 * The dart:ui library now always communicates in physical pixels. The
   framework is responsible for converting to whatever logical coordinate
   system it wishes to use.
 * The textBaselien property is now on TextStyle rather than ParagraphStyle,
   which will let us choose which baseline to use on a per-span basis rather
   than on a per-paragraph basis.
 * This patch also removes the old MojoServices function endpoints.

Fixes https://github.com/flutter/flutter/issues/3779
Fixes https://github.com/flutter/flutter/issues/1360