Enable Select-to-speak navigation features by default.

This feature will launch in M89.

AX-Relnotes: Enables Select-to-speak navigation features, which presents a control panel when STS is activated on non-system UI. The control panel enables users to pause/resume text-to-speech playback, navigate backwards/forwards by sentence and paragraph, and adjust reading speed. Users can disable/enable feature in STS settings page.

Bug: 1140216
Change-Id: I3b2c13a922eafb16cdfa40b0b6579de51059292b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2618585
Commit-Queue: Joel Riley <joelriley@google.com>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842241}

chrome/browser/accessibility/accessibility_extension_api_browsertest.cc

@@ -17,7 +17,16 @@
 
 namespace extensions {
 
-using AccessibilityPrivateApiTest = ExtensionApiTest;
+class AccessibilityPrivateApiTest : public ExtensionApiTest {
+ public:
+  void SetUp() override {
+    scoped_feature_list_.InitAndDisableFeature(
+        ::features::kSelectToSpeakNavigationControl);
+    ExtensionApiTest::SetUp();
+  }
+
+  base::test::ScopedFeatureList scoped_feature_list_;
+};
 
 IN_PROC_BROWSER_TEST_F(AccessibilityPrivateApiTest, SendSyntheticKeyEvent) {
   ASSERT_TRUE(RunExtensionSubtest("accessibility_private/",

ui/accessibility/accessibility_features.cc

@@ -117,7 +117,7 @@ bool IsAriaElementReflectionEnabled() {
 
 #if BUILDFLAG(IS_CHROMEOS_ASH)
 const base::Feature kSelectToSpeakNavigationControl{
-    "SelectToSpeakNavigationControl", base::FEATURE_DISABLED_BY_DEFAULT};
+    "SelectToSpeakNavigationControl", base::FEATURE_ENABLED_BY_DEFAULT};
 
 bool IsSelectToSpeakNavigationControlEnabled() {
   return base::FeatureList::IsEnabled(