GN: Build rules and fixes for (almost) all mojo unittest targets

mojo/public/cpp/bindings/tests/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.
+
+# GYP version: mojo/mojo_public_tests.gypi:mojo_public_bindings_unittests
+test("mojo_public_bindings_unittests") {
+  deps = [
+    "//mojo/common/test:run_all_unittests",
+    "//mojo/public/cpp/bindings",
+    "//mojo/public/cpp/environment:standalone",
+    "//mojo/public/cpp/test_support:test_utils",
+    "//mojo/public/cpp/utility",
+    "//mojo/public/interfaces/bindings/tests:test_interfaces",
+    "//testing/gtest",
+  ]
+
+  sources = [
+    "array_unittest.cc",
+    "bounds_checker_unittest.cc",
+    "buffer_unittest.cc",
+    "connector_unittest.cc",
+    "handle_passing_unittest.cc",
+    "interface_ptr_unittest.cc",
+    "request_response_unittest.cc",
+    "router_unittest.cc",
+    "sample_service_unittest.cc",
+    "serialization_warning_unittest.cc",
+    "string_unittest.cc",
+    "struct_unittest.cc",
+    "type_conversion_unittest.cc",
+    "validation_test_input_parser.cc",
+    "validation_test_input_parser.h",
+    "validation_unittest.cc",
+  ]
+}