Add a new v8_inspector target

sky/engine/v8_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("//build/config/ui.gni")
+import("//sky/engine/config.gni")
+
+visibility = ["//sky/*"]
+
+component("v8_inspector") {
+  output_name = "v8_inspector"
+
+  deps = [
+    "//sky/engine/core",
+    "//sky/engine/platform",
+  ]
+
+  configs += [
+    "//sky/engine:config",
+    "//sky/engine:inside_blink",
+    "//sky/engine:non_test_config",
+  ]
+
+  sources = [
+
+  ]
+}