First cut at "content handling" support in Mojo.

mojo/services/view_manager/view_manager_unittest.cc

Index: mojo/services/view_manager/view_manager_unittest.cc
diff --git a/mojo/services/view_manager/view_manager_unittest.cc b/mojo/services/view_manager/view_manager_unittest.cc
index 72ebffe4895f7db4b595a80241059b531f37a5b0..f002f273f3df3d46e91522f171761e2c6e75d2cb 100644
--- a/mojo/services/view_manager/view_manager_unittest.cc
+++ b/mojo/services/view_manager/view_manager_unittest.cc
@@ -380,9 +380,12 @@ class EmbedServiceLoader : public ServiceLoader,
   virtual ~EmbedServiceLoader() {}
 
   // ServiceLoader implementation:
-  virtual void LoadService(ServiceManager* manager,
-                           const GURL& url,
-                           ScopedMessagePipeHandle shell_handle) OVERRIDE {
+  virtual void Load(ServiceManager* manager,
+                    const GURL& url,
+                    scoped_refptr<LoadCallbacks> callbacks) OVERRIDE {
+    ScopedMessagePipeHandle shell_handle = callbacks->RegisterApplication();
+    if (!shell_handle.is_valid())
+      return;
     scoped_ptr<ApplicationImpl> app(new ApplicationImpl(this,
                                                         shell_handle.Pass()));
     apps_.push_back(app.release());