Consolidate javascript_dialog_manager.h and javascript_dialog_manager_impl.h

chrome/browser/extensions/alert_apitest.cc

Index: chrome/browser/extensions/alert_apitest.cc
diff --git a/chrome/browser/extensions/alert_apitest.cc b/chrome/browser/extensions/alert_apitest.cc
index 2b5787408ac8de7c534cc6383b304003a9c9333e..bb6b13fe0fae6a5946af59d89d034914516a7c2f 100644
--- a/chrome/browser/extensions/alert_apitest.cc
+++ b/chrome/browser/extensions/alert_apitest.cc
@@ -24,7 +24,8 @@ IN_PROC_BROWSER_TEST_F(ExtensionApiTest, AlertBasic) {
   host->host_contents()->GetMainFrame()->ExecuteJavaScript(
       base::ASCIIToUTF16("alert('This should not crash.');"));
 
-  AppModalDialog* alert = ui_test_utils::WaitForAppModalDialog();
+  app_modal_dialogs::AppModalDialog* alert =
+      ui_test_utils::WaitForAppModalDialog();
   ASSERT_TRUE(alert);
   alert->CloseModalDialog();
 }