Allow autoplay unmuted for WebAPK in the manifest scope

third_party/WebKit/Source/web/WebSettingsImpl.cpp

Index: third_party/WebKit/Source/web/WebSettingsImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebSettingsImpl.cpp b/third_party/WebKit/Source/web/WebSettingsImpl.cpp
index 30e251d19ec48927346e02867c4d6d2883061bcb..0d18192ef22ac1930d32cb2c2fa9a447a0bc1d52 100644
--- a/third_party/WebKit/Source/web/WebSettingsImpl.cpp
+++ b/third_party/WebKit/Source/web/WebSettingsImpl.cpp
@@ -629,6 +629,11 @@ void WebSettingsImpl::setMediaPlaybackRequiresUserGesture(bool required) {
   m_settings->setMediaPlaybackRequiresUserGesture(required);
 }
 
+void WebSettingsImpl::setMediaPlaybackGestureWhitelistScope(
+    const WebString& scope) {
+  m_settings->setMediaPlaybackGestureWhitelistScope(scope);
+}
+
 void WebSettingsImpl::setPresentationRequiresUserGesture(bool required) {
   m_settings->setPresentationRequiresUserGesture(required);
 }