Add glue between the client and engine for Blimp

blimp/engine/browser/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.
 
 source_set("browser") {
   sources = [
     "blimp_browser_context.cc",
     "blimp_browser_context.h",
     "blimp_browser_main_parts.cc",
     "blimp_browser_main_parts.h",
     "blimp_content_browser_client.cc",
     "blimp_content_browser_client.h",
     "blimp_engine_session.cc",
     "blimp_engine_session.h",
     "blimp_network_delegate.cc",
     "blimp_network_delegate.h",
     "blimp_permission_manager.cc",
     "blimp_permission_manager.h",
     "blimp_url_request_context_getter.cc",
     "blimp_url_request_context_getter.h",
+    "host_render_widget_message_processor.cc",
+    "host_render_widget_message_processor.h",
   ]
 
   deps = [
     "//base",
     "//blimp/common/proto",
     "//blimp/net:blimp_net",
     "//blimp/engine/ui",
     "//content",
     "//content/public/browser",
     "//content/public/common",
     "//content/public/utility",
     "//net",
     "//ui/base",
     "//ui/base/ime",
     "//ui/resources",
     "//ui/wm",
   ]
 }
+
+source_set("unit_tests") {
+  testonly = true
+
+  sources = [
+    "host_render_widget_message_processor_unittest.cc",
+  ]
+
+  deps = [
+    ":browser",
+    "//base",
+    "//base/test:run_all_unittests",
+    "//base/test:test_support",
+    "//blimp/common/proto",
+    "//blimp/engine/common",
+    "//blimp/net:blimp_net",
+    "//testing/gmock",
+    "//testing/gtest",
+  ]
+}