[inspector] use own copy of third_party/inspector_protocol

third_party/inspector_protocol/inspector_protocol.gypi

+# Copyright 2016 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.
+
+{
+  'variables': {
+    'inspector_protocol_files': [
+      'lib/Allocator_h.template',
+      'lib/Array_h.template',
+      'lib/BackendCallback_h.template',
+      'lib/Collections_h.template',
+      'lib/DispatcherBase_cpp.template',
+      'lib/DispatcherBase_h.template',
+      'lib/ErrorSupport_cpp.template',
+      'lib/ErrorSupport_h.template',
+      'lib/Forward_h.template',
+      'lib/FrontendChannel_h.template',
+      'lib/Maybe_h.template',
+      'lib/Object_cpp.template',
+      'lib/Object_h.template',
+      'lib/Parser_cpp.template',
+      'lib/Parser_h.template',
+      'lib/Protocol_cpp.template',
+      'lib/ValueConversions_h.template',
+      'lib/Values_cpp.template',
+      'lib/Values_h.template',
+      'templates/Exported_h.template',
+      'templates/Imported_h.template',
+      'templates/TypeBuilder_cpp.template',
+      'templates/TypeBuilder_h.template',
+      'CodeGenerator.py',
+    ]
+  }
+}