Add service registration for Mojo services defined under chrome/

chrome/browser/extensions/chrome_extension_web_contents_observer.cc

Index: chrome/browser/extensions/chrome_extension_web_contents_observer.cc
diff --git a/chrome/browser/extensions/chrome_extension_web_contents_observer.cc b/chrome/browser/extensions/chrome_extension_web_contents_observer.cc
index a407d627d8cb0cfa49bb6c91b9fbe0ec6bd29129..f95a833981cd556d866544748ee0ff3c82d462ee 100644
--- a/chrome/browser/extensions/chrome_extension_web_contents_observer.cc
+++ b/chrome/browser/extensions/chrome_extension_web_contents_observer.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
 
+#include "chrome/browser/extensions/chrome_mojo_service_registry.h"
 #include "chrome/browser/extensions/error_console/error_console.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/common/extensions/chrome_extension_messages.h"
@@ -91,4 +92,16 @@ void ChromeExtensionWebContentsObserver::ReloadIfTerminated(
   }
 }
 
+void ChromeExtensionWebContentsObserver::RegisterMojoServices(
+    content::RenderFrameHost* render_frame_host,
+    const Extension* extension) {
+  DCHECK(render_frame_host);
+  DCHECK(extension);
+
+  ExtensionWebContentsObserver::RegisterMojoServices(render_frame_host,
+                                                     extension);
+
+  RegisterChromeServicesForFrame(render_frame_host, extension);
+}
+
 }  // namespace extensions