Ship speech synthesis.

BUG=171887

Review URL: https://codereview.chromium.org/63043003

git-svn-id: svn://svn.chromium.org/blink/trunk@161668 bbb929c8-8fbe-4397-9dbb-9b2b20218538
diff --git a/LayoutTests/virtual/stable/webexposed/global-constructors-listing-expected.txt b/LayoutTests/virtual/stable/webexposed/global-constructors-listing-expected.txt
index aa8e918..b453aaf 100644
--- a/LayoutTests/virtual/stable/webexposed/global-constructors-listing-expected.txt
+++ b/LayoutTests/virtual/stable/webexposed/global-constructors-listing-expected.txt
@@ -393,6 +393,8 @@
 Selection
 SharedWorker
 SpeechInputEvent
+SpeechSynthesisEvent
+SpeechSynthesisUtterance
 Storage
 StorageEvent
 String
diff --git a/Source/platform/RuntimeEnabledFeatures.in b/Source/platform/RuntimeEnabledFeatures.in
index 49d6822..2a730f3 100644
--- a/Source/platform/RuntimeEnabledFeatures.in
+++ b/Source/platform/RuntimeEnabledFeatures.in
@@ -100,7 +100,7 @@
 ShadowDOM status=experimental
 SharedWorker status=stable
 SpeechInput status=stable
-SpeechSynthesis status=experimental
+SpeechSynthesis status=stable
 Srcset status=experimental
 Stream status=experimental
 StyleScoped status=experimental