[DevTools] Migrate target domain to new 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")
 import("//third_party/inspector_protocol/inspector_protocol.gni")
 
 group("resources") {
   public_deps = [
     ":devtools_resources",
@@ skipping 64 matching lines @@
     "protocol/schema.cc",
     "protocol/schema.h",
     "protocol/security.cc",
     "protocol/security.h",
     "protocol/service_worker.cc",
     "protocol/service_worker.h",
     "protocol/storage.cc",
     "protocol/storage.h",
     "protocol/system_info.cc",
     "protocol/system_info.h",
+    "protocol/target.cc",
+    "protocol/target.h",
     "protocol/tethering.cc",
     "protocol/tethering.h",
     "protocol/tracing.cc",
     "protocol/tracing.h",
   ]
 }
 
 action("gen_devtools_protocol_handler") {
   visibility = [ "//content/browser" ]
   deps = [
     "//third_party/WebKit/Source/core/inspector:protocol_version",
   ]
   script = "//content/browser/devtools/protocol/" +
            "devtools_protocol_handler_generator.py"
 
   blink_protocol = "$root_gen_dir/blink/core/inspector/protocol.json"
   inputs = [
     blink_protocol,
   ]
 
   outputs = [
     "$target_gen_dir/protocol/devtools_protocol_dispatcher.cc",
     "$target_gen_dir/protocol/devtools_protocol_dispatcher.h",
   ]
 
   args =
       rebase_path(inputs, root_build_dir) + rebase_path(outputs, root_build_dir)
 }