Consolidate javascript_dialog_manager.h and javascript_dialog_manager_impl.h

components/app_modal/javascript_native_dialog_factory.h

Index: components/app_modal/javascript_native_dialog_factory.h
diff --git a/components/app_modal/javascript_native_dialog_factory.h b/components/app_modal/javascript_native_dialog_factory.h
index 155af634443003dbbfb9e6b82c2397a4b4dda32a..d8f901c07c7e18837ce971c5ea85c234f59653c1 100644
--- a/components/app_modal/javascript_native_dialog_factory.h
+++ b/components/app_modal/javascript_native_dialog_factory.h
@@ -7,6 +7,8 @@
 
 #include "ui/gfx/native_widget_types.h"
 
+namespace app_modal {
+
 class JavaScriptAppModalDialog;
 class NativeAppModalDialog;
 
@@ -20,4 +22,6 @@ class JavaScriptNativeDialogFactory {
       gfx::NativeWindow parent_window) = 0;
 };
 
+}  // namespace app_modal
+
 #endif  // COMPONENTS_APP_MODAL_JAVASCRIPT_NATIVE_DIALOG_FACTORY_H_