Add browsingContext.bringToFront

index.bs

@@ -2124,6 +2124,50 @@ document loading at which a navigation command will return.
 
 ### Commands ### {#module-browsingContext-commands}
 
+#### The browsingContext.bringToFront Command ####  {#command-browsingContext-bringToFront}
+
+The <dfn export for=commands>browsingContext.bringToFront</dfn> command activates and focuses the given top-level browsing context.
+
+<dl>
+   <dt>Command Type</dt>
+   <dd>
+    <pre class="cddl remote-cddl">
+      browsingContext.BringToFront = {
+        method: "browsingContext.bringToFront",
+        params: browsingContext.BringToFrontParameters
+      };
+
+      browsingContext.BringToFrontParameters = {
+        context: browsingContext.BrowsingContext
+      }
+    </pre>
+   </dd>
+   <dt>Result Type</dt>
+   <dd>
+    <pre class="cddl">
+     EmptyResult
+    </pre>
+   </dd>
+</dl>
+
+<div algorithm="remote end steps for browsingContext.bringToFront">
+
+The [=remote end steps=] with |command parameters| are:
+
+1. Let |context id| be the value of the |command parameters|["<code>context</code>"] field.
+
+1. Let |context| be the result of [=trying=] to [=get a browsing context=] with |context id|.
+
+1. If |context| is not a [=top-level browsing context=], return [=error=] with [=error code=] [=invalid argument=].
+
+1. Run implementation-specific steps to bring the |context| to the top of the implementation-specific view hierarchy.
+
+1. Run implementation-specific steps to set the [[multipage/interaction#system-focus]] on the |context| if it is not focused.
+
+1. Return [=success=] with data null.
+
+</div>
+
 #### The browsingContext.captureScreenshot Command ####  {#command-browsingContext-captureScreenshot}
 
 The <dfn export for=commands>browsingContext.captureScreenshot</dfn> command