Reland [inspector] add inspector protocol parser test build target.

test/inspector_protocol_parser_test/BUILD.gn

+# Copyright 2016 the V8 project 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("../../gni/v8.gni")
+
+v8_executable("inspector_protocol_parser_test") {
+  testonly = true
+  deps = [
+    "../../src/inspector:inspector_protocol",
+    "//build/config/sanitizers:deps",
+    "//build/win:default_exe_manifest",
+    "//testing/gmock",
+    "//testing/gtest",
+  ]
+  configs = [
+    "../../src/inspector:inspector_protocol_config"
+  ]
+  sources = [
+    "//third_party/WebKit/Source/platform/inspector_protocol/ParserTest.cpp",
+    "RunTests.cpp",
+  ]
+}