Convert SetVisuallyDeemphasized IPC to mojo

chrome/browser/ui/apps/chrome_app_delegate.cc

Index: chrome/browser/ui/apps/chrome_app_delegate.cc
diff --git a/chrome/browser/ui/apps/chrome_app_delegate.cc b/chrome/browser/ui/apps/chrome_app_delegate.cc
index 5b90605119028199a8b6255ab8900720ccef53b1..6700b7cbdef205819823242692d1ebad7c552cbd 100644
--- a/chrome/browser/ui/apps/chrome_app_delegate.cc
+++ b/chrome/browser/ui/apps/chrome_app_delegate.cc
@@ -34,11 +34,14 @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/host_zoom_map.h"
 #include "content/public/browser/notification_service.h"
-#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/render_frame_host.h"
+#include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "extensions/common/constants.h"
+#include "extensions/common/mojo/app_window_handler.mojom.h"
 #include "printing/features/features.h"
+#include "services/service_manager/public/cpp/interface_provider.h"
 
 #if defined(USE_ASH)
 #include "ash/common/shelf/shelf_constants.h"  // nogncheck
@@ -305,10 +308,12 @@ void ChromeAppDelegate::SetWebContentsBlocked(
   if (!blocked)
     web_contents->Focus();
   // RenderViewHost may be NULL during shutdown.
-  content::RenderViewHost* host = web_contents->GetRenderViewHost();
+  content::RenderFrameHost* host = web_contents->GetMainFrame();
   if (host) {
-    host->Send(new ChromeViewMsg_SetVisuallyDeemphasized(host->GetRoutingID(),
-                                                         blocked));
+    extensions::mojom::AppWindowHandlerPtr app_window_handler;
+    host->GetProcess()->GetRemoteInterfaces()->GetInterface(
+        &app_window_handler);
+    app_window_handler->SetVisuallyDeemphasized(blocked);
   }
 }