Content handler for python.

mojo/public/python/BUILD.gn

Index: mojo/public/python/BUILD.gn
diff --git a/mojo/public/python/BUILD.gn b/mojo/public/python/BUILD.gn
index 5b9c8ab4054ca5872049cb3b417c931d85faf2aa..f4b0b03a37e87577ddd4b1998ecde5662040e4ca 100644
--- a/mojo/public/python/BUILD.gn
+++ b/mojo/public/python/BUILD.gn
@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//third_party/cython/rules.gni")
+import("rules.gni")
 
 group("python") {
   deps = [
@@ -94,3 +95,14 @@ copy("bindings") {
     ":mojo_system",
   ]
 }
+
+python_package("packaged_bindings") {
+  sources = [
+    "mojo_bindings/__init__.py",
+    "mojo_bindings/descriptor.py",
+    "mojo_bindings/messaging.py",
+    "mojo_bindings/promise.py",
+    "mojo_bindings/reflection.py",
+    "mojo_bindings/serialization.py",
+  ]
+}