Replace the remaining DOMWindowProperty with ContextClient

third_party/WebKit/Source/web/WebPluginContainerImpl.h

Index: third_party/WebKit/Source/web/WebPluginContainerImpl.h
diff --git a/third_party/WebKit/Source/web/WebPluginContainerImpl.h b/third_party/WebKit/Source/web/WebPluginContainerImpl.h
index 631ab11e66dc95bf6d68b4a99301dab970fc5ce7..a67de1a5bbe6baddb595f91e89ae236a62b7fa0b 100644
--- a/third_party/WebKit/Source/web/WebPluginContainerImpl.h
+++ b/third_party/WebKit/Source/web/WebPluginContainerImpl.h
@@ -32,7 +32,7 @@
 #ifndef WebPluginContainerImpl_h
 #define WebPluginContainerImpl_h
 
-#include "core/frame/DOMWindowProperty.h"
+#include "core/dom/ContextLifecycleObserver.h"
 #include "core/plugins/PluginView.h"
 #include "platform/Widget.h"
 #include "public/web/WebPluginContainer.h"
@@ -62,7 +62,7 @@ struct WebPrintPresetOptions;
 class WEB_EXPORT WebPluginContainerImpl final
     : public PluginView,
       NON_EXPORTED_BASE(public WebPluginContainer),
-      public DOMWindowProperty {
+      public ContextClient {
   USING_GARBAGE_COLLECTED_MIXIN(WebPluginContainerImpl);
   USING_PRE_FINALIZER(WebPluginContainerImpl, dispose);