[Switch Access] Focus input before activating dictation

into the wrong input.

AX-Relnotes: Fixes a Switch Access bug causing dictations to be entered
Bug: 1123707
Change-Id: I7f7df36667a1af2ecb7d770f4db89fa3d7e91703
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2386379Reviewed-by: David Tseng <dtseng@chromium.org>
Commit-Queue: Anastasia Helfinstein <anastasi@google.com>
Auto-Submit: Anastasia Helfinstein <anastasi@google.com>
Cr-Commit-Position: refs/heads/master@{#803668}

chrome/browser/resources/chromeos/accessibility/switch_access/nodes/editable_text_node.js

@@ -71,7 +71,16 @@ class EditableTextNode extends NodeWrapper {
         NavigationManager.enterKeyboard();
         return SAConstants.ActionResponse.CLOSE_MENU;
       case SwitchAccessMenuAction.DICTATION:
-        chrome.accessibilityPrivate.toggleDictation();
+        if (this.automationNode.state[chrome.automation.StateType.FOCUSED]) {
+          chrome.accessibilityPrivate.toggleDictation();
+        } else {
+          new EventHandler(
+              this.automationNode, chrome.automation.EventType.FOCUS,
+              () => chrome.accessibilityPrivate.toggleDictation(),
+              {exactMatch: true, listenOnce: true})
+              .start();
+          this.automationNode.focus();
+        }
         return SAConstants.ActionResponse.CLOSE_MENU;
       case SwitchAccessMenuAction.MOVE_CURSOR:
         return SAConstants.ActionResponse.OPEN_TEXT_NAVIGATION_MENU;