[mojo talk demo] Convert utility process CheckMediaFile IPC to mojo

chrome/utility/extensions/extensions_handler.h

Index: chrome/utility/extensions/extensions_handler.h
diff --git a/chrome/utility/extensions/extensions_handler.h b/chrome/utility/extensions/extensions_handler.h
index 4098d77a708172a9d3f2c9f5b6b6d586b16dbd59..735eb1c06f2f402ee67299ef7cb2c1061b5a80e7 100644
--- a/chrome/utility/extensions/extensions_handler.h
+++ b/chrome/utility/extensions/extensions_handler.h
@@ -22,6 +22,10 @@
 
 class ChromeContentUtilityClient;
 
+namespace service_manager {
+class InterfaceRegistry;
+}
+
 namespace extensions {
 
 // Dispatches IPCs for Chrome extensions utility messages.
@@ -32,6 +36,10 @@ class ExtensionsHandler : public UtilityMessageHandler {
 
   static void PreSandboxStartup();
 
+  static void ExposeInterfacesToBrowser(
+      service_manager::InterfaceRegistry* registry,
+      bool running_elevated);
+
   // UtilityMessageHandler:
   bool OnMessageReceived(const IPC::Message& message) override;