Simplify the ApplicationLoader interface in preparation for changes.

services/window_manager/window_manager_api_unittest.cc

Index: services/window_manager/window_manager_api_unittest.cc
diff --git a/services/window_manager/window_manager_api_unittest.cc b/services/window_manager/window_manager_api_unittest.cc
index a8f8d6a452410095ab4a100fa8c42bae67919205..dbd3da641092dcd8ec761e62aed63e2d1892e4b6 100644
--- a/services/window_manager/window_manager_api_unittest.cc
+++ b/services/window_manager/window_manager_api_unittest.cc
@@ -79,10 +79,9 @@ class TestApplicationLoader : public mojo::ApplicationLoader,
 
  private:
   // Overridden from mojo::ApplicationLoader:
-  void Load(mojo::ApplicationManager* application_manager,
-            const GURL& url,
-            mojo::InterfaceRequest<mojo::Application> application_request,
-            LoadCallback callback) override {
+  void Load(
+      const GURL& url,
+      mojo::InterfaceRequest<mojo::Application> application_request) override {
     ASSERT_TRUE(application_request.is_pending());
     scoped_ptr<ApplicationImpl> app(
         new ApplicationImpl(this, application_request.Pass()));