utils: ipc: import mojo

Import mojo from the Chromium repository, so that we can use it for
generating code for the IPC mechanism. The commit from which this was
taken is:
a079161ec8c6907b883f9cb84fc8c4e7896cb1d0 "Add PPAPI constructs for
sending focus object to PdfAccessibilityTree"

This tree has been pruned to remove directories that didn't have any
necessary code:
- mojo/* except for mojo/public
  - mojo core, docs, and misc files
- mojo/public/* except for mojo/public/{tools,LICENSE}
  - language bindings for IPC, tests, and some mojo internals
- mojo/public/tools/{fuzzers,chrome_ipc}
- mojo/public/tools/bindings/generators
  - code generation for other languages

No files were modified.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/utils/ipc/mojo/public/tools/mojom/README.md b/utils/ipc/mojo/public/tools/mojom/README.md
new file mode 100644
index 00000000..6a4ff78a
--- /dev/null
+++ b/utils/ipc/mojo/public/tools/mojom/README.md
@@ -0,0 +1,14 @@
+# The Mojom Parser
+
+The Mojom format is an interface definition language (IDL) for describing
+interprocess communication (IPC) messages and data types for use with the
+low-level cross-platform
+[Mojo IPC library](https://chromium.googlesource.com/chromium/src/+/master/mojo/public/c/system/README.md).
+
+This directory consists of a `mojom` Python module, its tests, and supporting
+command-line tools. The Python module implements the parser used by the
+command-line tools and exposes an API to help external bindings generators emit
+useful code from the parser's outputs.
+
+TODO(https://crbug.com/1060464): Fill out this documentation once the library
+and tools have stabilized.