Device name: Samsung Galaxy Tab S2 8"
Android version: 5.1.1
WebView version (from system settings -> Apps -> Android System WebView): 51.0.2704.36
Application: Speech Synthesis Utterance in WebView Test
Application version: 1.0

URLs (if applicable): https://github.com/pla1/SpeechSynthesisUtteranceInWebViewTest
http://pla1.net/tts.html



Steps to reproduce:
(1) git clone https://github.com/pla1/SpeechSynthesisUtteranceInWebViewTest.git
(2) Open and run project in Android Studio
(3) WebView loads http://pla1.net/tts.html successfully but does not find 'speechSynthesis' in window

Expected result: WebView should speak the test sentence "This is the emergency broadcast system."


Actual result: SpeechSynthesisUtterance is not supported and no text is spoken.