[DevTools] Added browser protocol to handler generator

content/browser/devtools/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("//tools/grit/grit_rule.gni")
 
 # In GYP: devtools_resources target.
 group("resources") {
   deps = [
     ":devtools_resources",
@@ skipping 46 matching lines @@
   ]
 }
 
 action("gen_devtools_protocol_handler") {
   visibility = [ ":devtools_protocol_handler" ]
 
   script = "//content/browser/devtools/protocol/" +
       "devtools_protocol_handler_generator.py"
 
   blink_protocol = "//third_party/WebKit/Source/devtools/protocol.json"
-  inputs = [ blink_protocol ]
+  browser_protocol = "browser_protocol.json"
+  inputs = [ blink_protocol, browser_protocol ]
 
   outputs = [
     "$target_gen_dir/protocol/devtools_protocol_handler_impl.cc",
     "$target_gen_dir/protocol/devtools_protocol_handler_impl.h",
   ]
 
-  args = [
-    rebase_path(blink_protocol, root_build_dir),
-  ] + rebase_path(outputs, root_build_dir)
+  args = rebase_path(inputs, root_build_dir) +
+      rebase_path(outputs, root_build_dir)
 }
 
 source_set("devtools_protocol_constants") {
   visibility = [ ":resources" ]
   sources = get_target_outputs(":gen_devtools_protocol_constants")
 }
 
 source_set("devtools_protocol_handler") {
   visibility = [ ":resources" ]
   sources = get_target_outputs(":gen_devtools_protocol_handler")
 }