SELECT popup: Make OPTIONs taller for touchscreen.

content/child/runtime_features.cc

Index: content/child/runtime_features.cc
diff --git a/content/child/runtime_features.cc b/content/child/runtime_features.cc
index 1f21881ce83357f69afd42ccfdc34f4217f7501e..74507588912746525d7a73bddff856f907d17af7 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -69,6 +69,10 @@ static void SetRuntimeFeatureDefaultsForPlatform() {
   WebRuntimeFeatures::EnableWebBluetooth(true);
 #endif
 
+#if defined(OS_CHROMEOS)
+  WebRuntimeFeatures::EnableForceTallerSelectPopup(true);
+#endif
+
 // The Notification Center on Mac OS X does not support content images.
 #if defined(OS_MACOSX)
   WebRuntimeFeatures::EnableNotificationContentImage(false);