Consolidate javascript_dialog_manager.h and javascript_dialog_manager_impl.h

components/app_modal_dialogs/javascript_dialog_extensions_client.h

Index: components/app_modal_dialogs/javascript_dialog_extensions_client.h
diff --git a/components/app_modal_dialogs/javascript_dialog_extensions_client.h b/components/app_modal_dialogs/javascript_dialog_extensions_client.h
index d5adb2decd50762d4f77a479c0db6780cad31aed..c8fdc5c61657fe2c7a6137e8676e8d9ee49adbaa 100644
--- a/components/app_modal_dialogs/javascript_dialog_extensions_client.h
+++ b/components/app_modal_dialogs/javascript_dialog_extensions_client.h
@@ -13,6 +13,8 @@ namespace content {
 class WebContents;
 }
 
+namespace app_modal_dialogs {
+
 // A client interface to access and control extensions/apps
 // that opened a JavaScript dialog.
 class JavaScriptDialogExtensionsClient {
@@ -35,4 +37,6 @@ class JavaScriptDialogExtensionsClient {
                                 std::string* name_out) = 0;
 };
 
+}  // namespace app_modal_dialogs
+
 #endif  // COMPONENTS_APP_MODAL_DIALOGS_JAVASCRIPT_DIALOG_EXTENSIONS_CLIENT_H_