electron · codebytere · Feb 2, 2019 · Jan 30, 2019
diff --git a/atom/browser/api/atom_api_content_tracing.cc b/atom/browser/api/atom_api_content_tracing.cc
@@ -81,11 +81,20 @@ v8::Local<v8::Promise> StopRecording(v8::Isolate* isolate,
   return promise->GetHandle();
 }
 
-bool GetCategories(
-    const base::RepeatingCallback<void(const std::set<std::string>&)>&
-        callback) {
-  return TracingController::GetInstance()->GetCategories(
-      base::BindOnce(callback));
+void OnCategoriesAvailable(scoped_refptr<atom::util::Promise> promise,
+                           const std::set<std::string>& categories) {
+  promise->Resolve(categories);
+}
+
+v8::Local<v8::Promise> GetCategories(v8::Isolate* isolate) {
+  scoped_refptr<atom::util::Promise> promise = new atom::util::Promise(isolate);
+  bool success = TracingController::GetInstance()->GetCategories(
+      base::BindOnce(&OnCategoriesAvailable, promise));
+
+  if (!success)
+    promise->RejectWithErrorMessage("Could not get categories.");
+
+  return promise->GetHandle();
 }
 
    void OnTracingStarted(scoped_refptr<atom::util::Promise> promise) {

diff --git a/docs/api/content-tracing.md b/docs/api/content-tracing.md
@@ -42,11 +42,18 @@ The `contentTracing` module has the following methods:
 * `callback` Function
   * `categories` String[]
 
-Get a set of category groups. The category groups can change as new code paths
-are reached.
+Get a set of category groups. The category groups can change as new code paths are reached.
+
+Once all child processes have acknowledged the `getCategories` request the `callback` is invoked with an array of category groups.
+
+**[Deprecated Soon](promisification.md)**
+
+### `contentTracing.getCategories()`
+
+Returns `Promise<String[]>` - resolves with an array of category groups once all child processes have acknowledged the `getCategories` request
+
+Get a set of category groups. The category groups can change as new code paths are reached.
 
-Once all child processes have acknowledged the `getCategories` request the
-`callback` is invoked with an array of category groups.
 
 ### `contentTracing.startRecording(options, callback)`
 

diff --git a/docs/api/promisification.md b/docs/api/promisification.md
@@ -11,7 +11,6 @@ When a majority of affected functions are migrated, this flag will be enabled by
 - [app.importCertificate(options, callback)](https://github.com/electron/electron/blob/master/docs/api/app.md#importCertificate)
 - [request.write(chunk[, encoding][, callback])](https://github.com/electron/electron/blob/master/docs/api/client-request.md#write)
 - [request.end([chunk][, encoding][, callback])](https://github.com/electron/electron/blob/master/docs/api/client-request.md#end)
-- [contentTracing.getCategories(callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#getCategories)
 - [contentTracing.getTraceBufferUsage(callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#getTraceBufferUsage)
 - [cookies.get(filter, callback)](https://github.com/electron/electron/blob/master/docs/api/cookies.md#get)
 - [cookies.set(details, callback)](https://github.com/electron/electron/blob/master/docs/api/cookies.md#set)
@@ -51,6 +50,7 @@ When a majority of affected functions are migrated, this flag will be enabled by
 - [webviewTag.capturePage([rect, ]callback)](https://github.com/electron/electron/blob/master/docs/api/webview-tag.md#capturePage)
 - [contents.capturePage([rect, ]callback)](https://github.com/electron/electron/blob/master/docs/api/web-contents.md#capturePage)
 - [app.getFileIcon(path[, options], callback)](https://github.com/electron/electron/blob/master/docs/api/app.md#getFileIcon)
+- [contentTracing.getCategories(callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#getCategories)
 - [contentTracing.startRecording(options, callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#startRecording)
 - [contentTracing.stopRecording(resultFilePath, callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#stopRecording)
 - [desktopCapturer.getSources(options, callback)](https://github.com/electron/electron/blob/master/docs/api/desktop-capturer.md#getSources)

diff --git a/lib/browser/api/content-tracing.js b/lib/browser/api/content-tracing.js
@@ -1,9 +1,9 @@
 'use strict'
-
 const { deprecate } = require('electron')
 const contentTracing = process.atomBinding('content_tracing')
 
 contentTracing.startRecording = deprecate.promisify(contentTracing.startRecording)
 contentTracing.stopRecording = deprecate.promisify(contentTracing.stopRecording)
+contentTracing.getCategories = deprecate.promisify(contentTracing.getCategories)
 
 module.exports = contentTracing