Disable color/date chooser in VR mode via WebPreferences

third_party/WebKit/Source/core/frame/Settings.json5

 {
   // Defines properties which are available on the Settings object.
   //
   // Please think carefully before adding a new Setting.  Some questions to
   // consider are:
   // - Should this be a RuntimeEnabledFeature instead? Settings are for things
   //   which we support either values of at runtime.  Features are set at renderer
   //   process startup and are never changed. Features also tend to be set to a
   //   value based on the platform or the stability of the code in question, where
   //   as settings both codepaths need to be stable.
@@ skipping 212 matching lines @@
     {
       name: "presentationRequiresUserGesture",
       initial: true,
     },
 
     {
       name: "embeddedMediaExperienceEnabled",
       initial: false,
     },
 
     {

[Rick Byers, 2017/05/23 21:36:36]

nit: please add a comment that describes (as precisely as possible) what exactly
is being enabled/disabled.  I think "Page Popup" is a bit of an overloaded term.
 If you can qualify specifically what properties makes it so that VR needs to
disable this, that would make things more clear.  It's probably also useful to
specifically describe the current use case in the comments ("used by VR mode" or
whatever).

+      name: "pagePopupsSuppressed",

[Rick Byers, 2017/05/23 21:36:36]

Nit: Prefer a positive name?
From a quick search of other settings it seems we prefer "fooEnabled" settings
that default to true over "fooSuppressed" that default to false.  Eg.
"supportsMultipleWindows".  Is there a reason this case should be special in
using the inverted "suppressed" semantics?

+      initial: false,
+    },
+
+    {
       name: "scrollAnimatorEnabled",
       initial: true,
     },
 
     // Used to disable threaded, compositor scrolling for testing purposes.
     // crbug.com/410974 tracks removal once alternative solutions for selective
     // main thread scrolling are supported.
     {
       name: "threadedScrollingEnabled",
       initial: true,
@@ skipping 675 matching lines @@
     },
 
     // Defines the autoplay policy to use.
     {
       name: "autoplayPolicy",
       type: "AutoplayPolicy::Type",
       initial: "AutoplayPolicy::Type::kNoUserGestureRequired",
     },
   ],
 }