[inspector] use own version of third_party/inspector_protocol

components/ui_devtools/BUILD.gn

Index: components/ui_devtools/BUILD.gn
diff --git a/components/ui_devtools/BUILD.gn b/components/ui_devtools/BUILD.gn
index e671d699a4d47801ee3888013d0d59d5a2dee2c0..f4ee8df15989320ebcfc7addb7cb624d1949edc3 100644
--- a/components/ui_devtools/BUILD.gn
+++ b/components/ui_devtools/BUILD.gn
@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-_inspector_protocol = "//third_party/WebKit/Source/platform/inspector_protocol"
+_inspector_protocol = "//third_party/inspector_protocol"
 import("$_inspector_protocol/inspector_protocol.gni")
 
 _protocol_generated = [
@@ -33,6 +33,7 @@ action("protocol_compatibility") {
 }
 
 inspector_protocol_generate("protocol_generated_sources") {
+  inspector_protocol_dir = _inspector_protocol
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
   deps = [