exo::CompositorFrameSinkHolder's release callbacks hold ref

components/exo/compositor_frame_sink_holder.cc

Index: components/exo/compositor_frame_sink_holder.cc
diff --git a/components/exo/compositor_frame_sink_holder.cc b/components/exo/compositor_frame_sink_holder.cc
index dd82aff4dc1dc915afc79434ccbb091dc0c6d476..e2a730ad4e746eea1924261ea7167ac95e9a0059 100644
--- a/components/exo/compositor_frame_sink_holder.cc
+++ b/components/exo/compositor_frame_sink_holder.cc
@@ -4,6 +4,7 @@
 
 #include "components/exo/compositor_frame_sink_holder.h"
 
+#include "base/callback_helpers.h"
 #include "cc/resources/returned_resource.h"
 #include "components/exo/surface.h"
 
@@ -32,7 +33,7 @@ bool CompositorFrameSinkHolder::HasReleaseCallbackForResource(
 void CompositorFrameSinkHolder::AddResourceReleaseCallback(
     cc::ResourceId id,
     std::unique_ptr<cc::SingleReleaseCallback> callback) {
-  release_callbacks_[id] = std::make_pair(this, std::move(callback));
+  release_callbacks_[id] = std::move(callback);
 }
 
 void CompositorFrameSinkHolder::ActivateFrameCallbacks(
@@ -83,10 +84,10 @@ void CompositorFrameSinkHolder::ReclaimResources(
   for (auto& resource : resources) {
     auto it = release_callbacks_.find(resource.id);
     DCHECK(it != release_callbacks_.end());
-    std::unique_ptr<cc::SingleReleaseCallback> callback =
-        std::move(it->second.second);
+    base::ScopedClosureRunner runner(base::Bind(
+        &cc::SingleReleaseCallback::Run, base::Passed(std::move(it->second)),
+        resource.sync_token, resource.lost));
     release_callbacks_.erase(it);
-    callback->Run(resource.sync_token, resource.lost);
   }
 }