inspector: migrate node to js_protocol.pdl

On inspector side we are going to deprecate .json protocol
definition formation and replace it with new .pdl format.
New format allows us to use multiline commends and contains less
noise in comparision then .json.

PR-URL: nodejs#20141
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: James M Snell <jasnell@keybase.io>

node.gyp

@@ -672,11 +672,32 @@
       'conditions': [
         [ 'v8_enable_inspector==1', {
           'actions': [
+            {
+              'action_name': 'v8_inspector_copy_protocol_to_intermediate_folder',
+              'inputs': [ 'deps/v8/src/inspector/js_protocol.pdl' ],
+              'outputs': [ '<(SHARED_INTERMEDIATE_DIR)/js_protocol.pdl' ],
+              'action': [ 'cp', '<@(_inputs)', '<(SHARED_INTERMEDIATE_DIR)' ],
+            },
+            {
+              'action_name': 'v8_inspector_convert_protocol_to_json',
+              'inputs': [
+                '<(SHARED_INTERMEDIATE_DIR)/js_protocol.pdl',
+              ],
+              'outputs': [
+                '<(SHARED_INTERMEDIATE_DIR)/js_protocol.json',
+              ],
+              'action': [
+                'python',
+                'deps/v8/third_party/inspector_protocol/ConvertProtocolToJSON.py',
+                '<@(_inputs)',
+                '<@(_outputs)',
+              ],
+            },
             {
               'action_name': 'v8_inspector_compress_protocol_json',
               'process_outputs_as_sources': 1,
               'inputs': [
-                'deps/v8/src/inspector/js_protocol.json',
+                '<(SHARED_INTERMEDIATE_DIR)/js_protocol.json',
               ],
               'outputs': [
                 '<(SHARED_INTERMEDIATE_DIR)/v8_inspector_protocol_json.h',