Move AppWindow to extensions

apps/app_shim/extension_app_shim_handler_mac_unittest.cc

Index: apps/app_shim/extension_app_shim_handler_mac_unittest.cc
diff --git a/apps/app_shim/extension_app_shim_handler_mac_unittest.cc b/apps/app_shim/extension_app_shim_handler_mac_unittest.cc
index 573a48f292a9019d8ba8d0e50fba867cce60f24d..27791d9539a40809c5ac26b30e473e67d6576e97 100644
--- a/apps/app_shim/extension_app_shim_handler_mac_unittest.cc
+++ b/apps/app_shim/extension_app_shim_handler_mac_unittest.cc
@@ -18,7 +18,7 @@
 namespace apps {
 
 using extensions::Extension;
-typedef AppWindowRegistry::AppWindowList AppWindowList;
+typedef extensions::AppWindowRegistry::AppWindowList AppWindowList;
 
 using ::testing::_;
 using ::testing::Invoke;
@@ -176,7 +176,7 @@ class ExtensionAppShimHandlerTest : public testing::Test {
     // In most tests, we don't care about the result of GetWindows, it just
     // needs to be non-empty.
     AppWindowList app_window_list;
-    app_window_list.push_back(static_cast<AppWindow*>(NULL));
+    app_window_list.push_back(static_cast<extensions::AppWindow*>(NULL));
     EXPECT_CALL(*delegate_, GetWindows(_, _))
         .WillRepeatedly(Return(app_window_list));