Consolidate javascript_dialog_manager.h and javascript_dialog_manager_impl.h

components/app_modal/views/javascript_app_modal_dialog_views.cc

Index: components/app_modal/views/javascript_app_modal_dialog_views.cc
diff --git a/components/app_modal/views/javascript_app_modal_dialog_views.cc b/components/app_modal/views/javascript_app_modal_dialog_views.cc
index 575e66ca543d1b8abb6348d3b5757c68aad5162a..7488272b51d2666427a95fa52f52d451aeec8643 100644
--- a/components/app_modal/views/javascript_app_modal_dialog_views.cc
+++ b/components/app_modal/views/javascript_app_modal_dialog_views.cc
@@ -15,6 +15,8 @@
 #include "ui/views/widget/widget.h"
 #include "ui/views/window/dialog_client_view.h"
 
+namespace app_modal {
+
 ////////////////////////////////////////////////////////////////////////////////
 // JavaScriptAppModalDialogViews, public:
 
@@ -151,3 +153,5 @@ views::View* JavaScriptAppModalDialogViews::GetInitiallyFocusedView() {
     return message_box_view_->text_box();
   return views::DialogDelegate::GetInitiallyFocusedView();
 }
+
+}  // namespace app_modal