[chrome.displaySource] Move mojo interfaces to a nested namespace.

extensions/renderer/api/display_source/wifi_display/wifi_display_media_manager.cc

Index: extensions/renderer/api/display_source/wifi_display/wifi_display_media_manager.cc
diff --git a/extensions/renderer/api/display_source/wifi_display/wifi_display_media_manager.cc b/extensions/renderer/api/display_source/wifi_display/wifi_display_media_manager.cc
index 55a9d751157290c4f6ff87cf90fd35f12dc16ae3..b49916a3d683e42be0c984c24f798b67cffd194e 100644
--- a/extensions/renderer/api/display_source/wifi_display/wifi_display_media_manager.cc
+++ b/extensions/renderer/api/display_source/wifi_display/wifi_display_media_manager.cc
@@ -474,7 +474,7 @@ void WiFiDisplayMediaManager::OnMediaPipelineInitialized(bool success) {
 // Note: invoked on IO thread
 void WiFiDisplayMediaManager::RegisterMediaService(
     const scoped_refptr<base::SingleThreadTaskRunner>& main_runner,
-    WiFiDisplayMediaServiceRequest request,
+    mojom::WiFiDisplayMediaServiceRequest request,
     const base::Closure& on_completed) {
   auto connect_service_callback =
       base::Bind(&WiFiDisplayMediaManager::ConnectToRemoteService,
@@ -486,7 +486,7 @@ void WiFiDisplayMediaManager::RegisterMediaService(
 }
 
 void WiFiDisplayMediaManager::ConnectToRemoteService(
-    WiFiDisplayMediaServiceRequest request) {
+    mojom::WiFiDisplayMediaServiceRequest request) {
   DCHECK(content::RenderThread::Get());
   interface_provider_->GetInterface(std::move(request));
 }