exo: Recreate Surface resources on context lost.

content/browser/compositor/owned_mailbox.h

Index: content/browser/compositor/owned_mailbox.h
diff --git a/content/browser/compositor/owned_mailbox.h b/content/browser/compositor/owned_mailbox.h
index cbf1593111e982b98960d02b53a8e7dd38433b21..d0bd7b5d47cdf3721d2f2c379615cf231ddb9cc7 100644
--- a/content/browser/compositor/owned_mailbox.h
+++ b/content/browser/compositor/owned_mailbox.h
@@ -11,6 +11,7 @@
 #include "content/browser/compositor/image_transport_factory.h"
 #include "content/common/content_export.h"
 #include "gpu/command_buffer/common/mailbox_holder.h"
+#include "ui/compositor/compositor.h"
 
 namespace display_compositor {
 class GLHelper;
@@ -23,7 +24,7 @@ namespace content {
 // id when the object itself is destroyed. Should only be created if a GLHelper
 // exists on the ImageTransportFactory.
 class CONTENT_EXPORT OwnedMailbox : public base::RefCounted<OwnedMailbox>,
-                                    public ImageTransportFactoryObserver {
+                                    public ui::ContextFactoryObserver {
  public:
   explicit OwnedMailbox(display_compositor::GLHelper* gl_helper);