Add data files for base and net. Move GN Python proto outputs.

third_party/protobuf/proto_library.gni

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Compile a protocol buffer.
 #
 # Protobuf parameters:
 #
 #   proto_out_dir (optional)
 #       Specifies the path suffix that output files are generated under. This
@@ skipping 56 matching lines @@
 
     sources = invoker.sources
 
     # Compute the output directory, both relative to the source root (for
     # declaring "outputs") and relative to the build dir (for passing to the
     # script).
     if (defined(invoker.proto_out_dir)) {
       # Put the results in the specified dir in the gen tree.
       out_dir = "$root_gen_dir/" + invoker.proto_out_dir
       rel_out_dir = rebase_path(out_dir, root_build_dir)
+      py_out_dir = "$root_out_dir/pyproto/" + invoker.proto_out_dir
     } else {
-      # Use the gen directory corresponding to the source file. This expansion
-      # will be done differently in the outputs and the args, so we don't need
-      # to worry about rebasing as above.
+      # Use the gen directory corresponding to the source file for C++ sources.
+      # This expansion will be done differently in the outputs and the args, so
+      # we don't need to worry about rebasing as above. Always put Python
+      # sources in "pyproto".
       out_dir = "{{source_gen_dir}}"
       rel_out_dir = "{{source_gen_dir}}"
+      py_out_dir = "$root_out_dir/pyproto/{{source_root_relative_dir}}"
     }
+    rel_py_out_dir = rebase_path(py_out_dir, root_build_dir)
 
     outputs = [
-      "$out_dir/{{source_name_part}}_pb2.py",
+      "$py_out_dir/{{source_name_part}}_pb2.py",
       "$out_dir/{{source_name_part}}.pb.cc",
       "$out_dir/{{source_name_part}}.pb.h",
     ]
 
     args = []
     if (defined(invoker.cc_include)) {
       args += [
         "--include",
         invoker.cc_include,
       ]
@@ skipping 29 matching lines @@
     if (defined(invoker.cc_generator_options)) {
       cc_generator_options = invoker.cc_generator_options
     } else {
       cc_generator_options = ""
     }
     args += [
       # cc_generator_options is supposed to end in a colon if it's nonempty.
       "--cpp_out",
       "$cc_generator_options$rel_out_dir",
       "--python_out",
-      rel_out_dir,
+      rel_py_out_dir,
     ]
 
     deps = [
       protoc_label,
     ]
 
     if (defined(invoker.deps)) {
       deps += invoker.deps
     }
   }
@@ skipping 17 matching lines @@
     public_deps = [
       # The generated headers reference headers within protobuf_lite, so
       # dependencies must be able to find those headers too.
       "//third_party/protobuf:protobuf_lite",
     ]
     deps = [
       ":$action_name",
     ]
   }
 }