[DevTools] pass v8_inspector_js_protocol as default for .imported.path in conf

third_party/WebKit/Source/core/inspector/BUILD.gn

 # 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.
 
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 import(
     "//third_party/WebKit/Source/platform/inspector_protocol/inspector_protocol.gni")
 import("//v8/gni/v8.gni")
 
@@ skipping 111 matching lines @@
   ]
 }
 
 # inspector protocol -----------------------------------------------------------
 
 inspector_protocol_generate("protocol_sources") {
   out_dir = blink_core_output_dir
 
   config_file = "inspector_protocol_config.json"
 
+  imported_protocol_path = v8_inspector_js_protocol
+
   inputs = [
     "browser_protocol.json",
     v8_inspector_js_protocol,
     "inspector_protocol_config.json",
   ]
 
   # These are relative to blink_core_output_dir.
   outputs = [
     "inspector/protocol/Accessibility.cpp",
     "inspector/protocol/Accessibility.h",
@@ skipping 118 matching lines @@
   outputs = [
     output_file,
   ]
 
   args = [
     rebase_path("browser_protocol.json", root_build_dir),
     rebase_path(v8_inspector_js_protocol, root_build_dir),
     rebase_path(output_file, root_build_dir),
   ]
 }