Only generate code for files that are specified, not their imports.

mojo/public/tools/bindings/mojom_bindings_generator_v2.py

Index: mojo/public/tools/bindings/mojom_bindings_generator_v2.py
diff --git a/mojo/public/tools/bindings/mojom_bindings_generator_v2.py b/mojo/public/tools/bindings/mojom_bindings_generator_v2.py
index 5599c816166f1dcc76499e6e1884a3169057d215..a458b0d57feb745cb58d608b6b58c559130afc23 100755
--- a/mojo/public/tools/bindings/mojom_bindings_generator_v2.py
+++ b/mojo/public/tools/bindings/mojom_bindings_generator_v2.py
@@ -87,6 +87,8 @@ def RunGenerators(serialized_file_graph, args, remaining_args):
   # Some language-specific args may be found in remaining_args. See
   # run_code_generators.py and look for GENERATOR_PREFIX for more information.
   cmd.extend(remaining_args)
+  if not args.no_gen_imports:
+    cmd.extend(args.filename)
 
   process = subprocess.Popen(cmd, stdin=subprocess.PIPE)
   process.communicate(serialized_file_graph)
@@ -119,6 +121,11 @@ def main(argv):
   parser.add_argument("-p", "--python-sdk-dir", dest="python_sdk_dir",
                       help="Location of the compiled python bindings",
                       default="")
+  parser.add_argument("--no-gen-imports", action="store_true",
+                      help="Generate code only for the files that are "
+                      "specified on the command line. By default, code "
+                      "is generated for all specified files and their "
+                      "transitive imports.")
   (args, remaining_args) = parser.parse_known_args(argv)
 
   serialized_file_graph = RunParser(args)