Blimp: create MessageDispatcher class.

blimp/net/BUILD.gn

+# Copyright 2015 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("//testing/test.gni")
+
+component("blimp_net") {
+  sources = [
+    "blimp_message_dispatcher.cc",
+    "blimp_message_dispatcher.h",
+    "blimp_message_receiver.h",
+    "blimp_net_export.h",
+  ]
+
+  defines = [ "BLIMP_NET_IMPLEMENTATION=1" ]
+
+  deps = [
+    "//base",
+    "//blimp/common/proto",
+    "//net",
+  ]
+}
+
+test("blimp_net_tests") {
+  sources = [
+    "blimp_message_dispatcher_unittest.cc",
+  ]
+
+  deps = [
+    ":blimp_net",
+    "//base",
+    "//base/test:run_all_unittests",
+    "//base/test:test_support",
+    "//blimp/common/proto",
+    "//net:test_support",
+    "//testing/gmock",
+    "//testing/gtest",
+  ]
+}
+
+# TODO(GYP): Delete this after we've converted everything to GN.
+# # The _run targets exist only for compatibility w/ GYP.
+group("blimp_net_tests_run") {
+  testonly = true
+  deps = [
+    ":blimp_net_tests",
+  ]
+}