Simplify ContentHandlerFactory a bit.

services/js/content_handler_main.cc

Index: services/js/content_handler_main.cc
diff --git a/services/js/content_handler_main.cc b/services/js/content_handler_main.cc
index 5f305612fbec473ad106cf29a618f7634df80e56..9ed4f8479b0974d18c0d055b21ad8143e6016733 100644
--- a/services/js/content_handler_main.cc
+++ b/services/js/content_handler_main.cc
@@ -17,7 +17,7 @@ namespace js {
 class JsContentHandler : public mojo::ApplicationDelegate,
                          public mojo::ContentHandlerFactory::ManagedDelegate {
  public:
-  JsContentHandler() : content_handler_factory_(this) {}
+  JsContentHandler() {}
 
  private:
   // Overridden from mojo::ApplicationDelegate:
@@ -33,7 +33,7 @@ class JsContentHandler : public mojo::ApplicationDelegate,
   bool ConfigureIncomingConnection(
       mojo::ServiceProviderImpl* service_provider_impl) override {
     service_provider_impl->AddService<mojo::ContentHandler>(
-        content_handler_factory_.GetInterfaceRequestHandler());
+        mojo::ContentHandlerFactory::GetInterfaceRequestHandler(this));
     return true;
   }
 
@@ -46,8 +46,6 @@ class JsContentHandler : public mojo::ApplicationDelegate,
         new JSApp(application_request.Pass(), response.Pass()));
   }
 
-  mojo::ContentHandlerFactory content_handler_factory_;
-
   DISALLOW_COPY_AND_ASSIGN(JsContentHandler);
 };