Media Controls: make the MediaControlsOverlayPlayButton a runtime enabled flag.

chromecast/renderer/cast_content_renderer_client.cc

Index: chromecast/renderer/cast_content_renderer_client.cc
diff --git a/chromecast/renderer/cast_content_renderer_client.cc b/chromecast/renderer/cast_content_renderer_client.cc
index 57089adefc565527a85bf185f75c3a341b5b0280..49fcfa70d0fef709d28390c6b3093fdcd9ad032f 100644
--- a/chromecast/renderer/cast_content_renderer_client.cc
+++ b/chromecast/renderer/cast_content_renderer_client.cc
@@ -98,9 +98,6 @@ void CastContentRendererClient::RenderViewCreated(
     blink::WebFrameWidget* web_frame_widget = render_view->GetWebFrameWidget();
     web_frame_widget->setBaseBackgroundColor(kColorBlack);
 
-    // Settings for ATV (Android defaults are not what we want):
-    webview->settings()->setMediaControlsOverlayPlayButtonEnabled(false);
-
     // Disable application cache as Chromecast doesn't support off-line
     // application running.
     webview->settings()->setOfflineWebApplicationCacheEnabled(false);
@@ -148,5 +145,11 @@ bool CastContentRendererClient::AllowMediaSuspend() {
   return false;
 }
 
+void CastContentRendererClient::
+    SetRuntimeFeaturesDefaultsBeforeBlinkInitialization() {
+  // Settings for ATV (Android defaults are not what we want).
+  WebRuntimeFeatures::enableMediaControlsOverlayPlayButton(false);

[halliwell, 2017/03/03 15:26:29]

do you need to include a header for WebRuntimeFeatures?

+}
+
 }  // namespace shell
 }  // namespace chromecast