Consolidate javascript_dialog_manager.h and javascript_dialog_manager_impl.h

components/app_modal/views/javascript_app_modal_dialog_views.h

Index: components/app_modal/views/javascript_app_modal_dialog_views.h
diff --git a/components/app_modal/views/javascript_app_modal_dialog_views.h b/components/app_modal/views/javascript_app_modal_dialog_views.h
index 81653930d1437363bb61f7475398e20d0b70114c..6af35ba2439028c293fc8880ad3b7cf5e1062758 100644
--- a/components/app_modal/views/javascript_app_modal_dialog_views.h
+++ b/components/app_modal/views/javascript_app_modal_dialog_views.h
@@ -15,6 +15,8 @@ namespace views {
 class MessageBoxView;
 }
 
+namespace app_modal {
+
 class JavaScriptAppModalDialogViews : public NativeAppModalDialog,
                                       public views::DialogDelegate {
  public:
@@ -56,4 +58,6 @@ class JavaScriptAppModalDialogViews : public NativeAppModalDialog,
   DISALLOW_COPY_AND_ASSIGN(JavaScriptAppModalDialogViews);
 };
 
+}  // namespace app_modal
+
 #endif  // COMPONENTS_APP_MODAL_VIEWS_JAVASCRIPT_APP_MODAL_DIALOG_VIEWS_H_