Use ShellPtr type in ApplicationLoader instead of untyped handles

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 2dd856e67868f99e00d0da2ad3a9bc19b12b6c37..3960874fed01698d1d5db0b75ea8c5ecd91747b6 100644
--- a/services/window_manager/window_manager_api_unittest.cc
+++ b/services/window_manager/window_manager_api_unittest.cc
@@ -83,11 +83,10 @@ class TestApplicationLoader : public mojo::ApplicationLoader,
   // Overridden from mojo::ApplicationLoader:
   void Load(mojo::ApplicationManager* application_manager,
             const GURL& url,
-            mojo::ScopedMessagePipeHandle shell_handle,
+            mojo::ShellPtr shell,
             LoadCallback callback) override {
-    ASSERT_TRUE(shell_handle.is_valid());
-    scoped_ptr<ApplicationImpl> app(
-        new ApplicationImpl(this, shell_handle.Pass()));
+    ASSERT_TRUE(shell);
+    scoped_ptr<ApplicationImpl> app(new ApplicationImpl(this, shell.Pass()));
     apps_.push_back(app.release());
   }
   void OnApplicationError(mojo::ApplicationManager* application_manager,