[chrome.displaySource] Add WiFi Display session class skeleton and mojo service

extensions/browser/mojo/service_registration.cc

 // 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.
 
 #include "extensions/browser/mojo/service_registration.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/common/service_registry.h"
 #include "extensions/browser/api/serial/serial_service_factory.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extensions_browser_client.h"
 #include "extensions/browser/mojo/keep_alive_impl.h"
 #include "extensions/browser/process_map.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension_api.h"
 #include "extensions/common/switches.h"
 
+#if defined(ENABLE_WIFI_DISPLAY)
+#include "extensions/browser/api/display_source/wifi_display/wifi_display_session_service_impl.h"
+#endif
+
 namespace extensions {
 namespace {
 
 bool ExtensionHasPermission(const Extension* extension,
                             content::RenderProcessHost* render_process_host,
                             const std::string& permission_name) {
   Feature::Context context =
       ProcessMap::Get(render_process_host->GetBrowserContext())
           ->GetMostLikelyContextType(extension, render_process_host->GetID());
 
@@ skipping 13 matching lines @@
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableMojoSerialService)) {
     if (ExtensionHasPermission(extension, render_frame_host->GetProcess(),
                                "serial")) {
       service_registry->AddService(base::Bind(&BindToSerialServiceRequest));
     }
   }
   service_registry->AddService(base::Bind(
       KeepAliveImpl::Create,
       render_frame_host->GetProcess()->GetBrowserContext(), extension));
+
+#if defined(ENABLE_WIFI_DISPLAY)
+  if (ExtensionHasPermission(extension, render_frame_host->GetProcess(),
+                             "displaySource")) {
+    service_registry->AddService(
+        base::Bind(WiFiDisplaySessionServiceImpl::BindToRequest,
+                   render_frame_host->GetProcess()->GetBrowserContext()));
+  }
+#endif
 }
 
 }  // namespace extensions