Enable Kaleidoscope Chrome code

As discussed, since this is a server side driven
feature we can switch this on by default and use
the server side allowlist.

BUG=1044741

Change-Id: I74a0352062c718027bef90aad42f202934a96289
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2261632
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#782582}

chrome/browser/media/kaleidoscope/kaleidoscope_tab_helper.cc

@@ -31,8 +31,8 @@ void KaleidoscopeTabHelper::ReadyToCommitNavigation(
     return;
   }
 
-  if (handle->GetInitiatorOrigin().has_value() &&
-      handle->GetInitiatorOrigin() != KaleidoscopeOrigin()) {
+  if (!handle->GetInitiatorOrigin() ||
+      !handle->GetInitiatorOrigin()->IsSameOriginWith(KaleidoscopeOrigin())) {
     return;
   }
 

media/base/media_switches.cc

@@ -726,7 +726,7 @@ const base::Feature kInternalMediaSession {
 };
 
 const base::Feature kKaleidoscope{"Kaleidoscope",
-                                  base::FEATURE_DISABLED_BY_DEFAULT};
+                                  base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kUseFakeDeviceForMediaStream{
     "use-fake-device-for-media-stream", base::FEATURE_DISABLED_BY_DEFAULT};