Embed a simple Mojo shell in content

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index 8b4c4a9a455e5c7e15f57d8ae90cad97f9b48388..73151988d4db46ccab617232a9a9a25b94163bb7 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -92,6 +92,7 @@ class DevToolsManagerDelegate;
 class ExternalVideoSurfaceContainer;
 class LocationProvider;
 class MediaObserver;
+class MojoShellContext;
 class NavigatorConnectContext;
 class NavigatorConnectServiceFactory;
 class PlatformNotificationService;
@@ -631,6 +632,9 @@ class CONTENT_EXPORT ContentBrowserClient {
   virtual ExternalVideoSurfaceContainer*
   OverrideCreateExternalVideoSurfaceContainer(WebContents* web_contents);
 #endif
+
+  // Allows the embedder to configure the global Mojo shell.
+  virtual void ConfigureMojoShell(MojoShellContext* context);
 };
 
 }  // namespace content