Add speech synthesis to WebRuntimeFeatures.

Source/WebKit/chromium/src/WebRuntimeFeatures.cpp

Index: Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
diff --git a/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp b/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
index f918874c4cc15c2129f8772178df124739fbd811..99b86406227bdfb408d34e01379621542cecb168 100644
--- a/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
+++ b/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
@@ -510,4 +510,14 @@ bool WebRuntimeFeatures::areExperimentalCanvasFeaturesEnabled()
     return RuntimeEnabledFeatures::experimentalCanvasFeaturesEnabled();
 }
 
+void WebRuntimeFeatures::enableSpeechSynthesis(bool enable)
+{
+    RuntimeEnabledFeatures::setSpeechSynthesisEnabled(enable);
+}
+
+bool WebRuntimeFeatures::isSpeechSynthesisEnabled()
+{
+    return RuntimeEnabledFeatures::speechSynthesisEnabled();
+}
+
 } // namespace WebKit