Revert: Change CaptureSynchronizer and PointerWatcherEventRouter to support multiple CaptureClients

ui/views/mus/mus_client.cc

Index: ui/views/mus/mus_client.cc
diff --git a/ui/views/mus/mus_client.cc b/ui/views/mus/mus_client.cc
index a30260dd0fd766fb89418d966ff22f24fa0e14ef..743ea2847545c2f181efda5157e4b3a916845190 100644
--- a/ui/views/mus/mus_client.cc
+++ b/ui/views/mus/mus_client.cc
@@ -16,7 +16,6 @@
 #include "services/ui/public/interfaces/event_matcher.mojom.h"
 #include "services/ui/public/interfaces/window_manager.mojom.h"
 #include "ui/aura/env.h"
-#include "ui/aura/mus/capture_synchronizer.h"
 #include "ui/aura/mus/mus_context_factory.h"
 #include "ui/aura/mus/os_exchange_data_provider_mus.h"
 #include "ui/aura/mus/property_converter.h"
@@ -223,20 +222,6 @@
   return native_widget;
 }
 
-void MusClient::OnCaptureClientSet(
-    aura::client::CaptureClient* capture_client) {
-  pointer_watcher_event_router_->AttachToCaptureClient(capture_client);
-  window_tree_client_->capture_synchronizer()->AttachToCaptureClient(
-      capture_client);
-}
-
-void MusClient::OnCaptureClientUnset(
-    aura::client::CaptureClient* capture_client) {
-  pointer_watcher_event_router_->DetachFromCaptureClient(capture_client);
-  window_tree_client_->capture_synchronizer()->DetachFromCaptureClient(
-      capture_client);
-}
-
 void MusClient::AddObserver(MusClientObserver* observer) {
   observer_list_.AddObserver(observer);
 }