Consolidate javascript_dialog_manager.h and javascript_dialog_manager_impl.h

components/app_modal_dialogs/app_modal_dialog.cc

Index: components/app_modal_dialogs/app_modal_dialog.cc
diff --git a/components/app_modal_dialogs/app_modal_dialog.cc b/components/app_modal_dialogs/app_modal_dialog.cc
index 7156520219454f798d56bc2a64c7ccffebce27e0..d54de76d1dc432fb6f7e46a11c89ade8f86d56c2 100644
--- a/components/app_modal_dialogs/app_modal_dialog.cc
+++ b/components/app_modal_dialogs/app_modal_dialog.cc
@@ -13,6 +13,7 @@
 
 using content::WebContents;
 
+namespace app_modal_dialogs {
 namespace {
 
 AppModalDialogObserver* app_modal_dialog_observer = NULL;
@@ -82,3 +83,5 @@ void AppModalDialog::CompleteDialog() {
     AppModalDialogQueue::GetInstance()->ShowNextDialog();
   }
 }
+
+}  // namespace app_modal_dialogs