Avoid destroying surface before the parent surface stops referencing it.

content/browser/compositor/delegated_frame_host.cc

Index: content/browser/compositor/delegated_frame_host.cc
diff --git a/content/browser/compositor/delegated_frame_host.cc b/content/browser/compositor/delegated_frame_host.cc
index f943dd2ded246a9a5493b894aab2a602a4c15656..c2c0f19e1746c3bbc156ad696c984b3bacbbb3ae 100644
--- a/content/browser/compositor/delegated_frame_host.cc
+++ b/content/browser/compositor/delegated_frame_host.cc
@@ -54,7 +54,7 @@ void DelegatedFrameHostClient::RequestCopyOfOutput(
 DelegatedFrameHost::DelegatedFrameHost(DelegatedFrameHostClient* client)
     : client_(client),
       use_surfaces_(base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kUseSurfaces)),
+                        switches::kUseSurfaces)),
       last_output_surface_id_(0),
       pending_delegated_ack_count_(0),
       skipped_frames_(false),
@@ -372,16 +372,22 @@ void DelegatedFrameHost::SwapDelegatedFrame(
       if (!surface_factory_) {
         ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
         cc::SurfaceManager* manager = factory->GetSurfaceManager();
-        id_allocator_ = factory->CreateSurfaceIdAllocator();
+        id_allocator_ =
+            factory->GetContextFactory()->CreateSurfaceIdAllocator();
         surface_factory_ =
             make_scoped_ptr(new cc::SurfaceFactory(manager, this));
       }
       if (surface_id_.is_null() || frame_size != current_surface_size_ ||
           frame_size_in_dip != current_frame_size_in_dip_) {
-        // TODO(jbauman): Wait to destroy this surface until the parent has
-        // finished using it.
-        if (!surface_id_.is_null())
-          surface_factory_->Destroy(surface_id_);
+        if (!surface_id_.is_null()) {
+          if (compositor) {
+            std::set<cc::SurfaceSequence> s;

[jamesr, 2014/09/12 01:08:55]

's' seems a bit too terse, maybe 'seq' ?

[jbauman, 2014/09/23 01:58:05]

Done.

+            s.insert(compositor->CreateSurfaceSequence());
+            surface_factory_->DestroyOnSequence(surface_id_, s);
+          } else {
+            surface_factory_->Destroy(surface_id_);
+          }
+        }
         surface_id_ = id_allocator_->GenerateId();
         surface_factory_->Create(surface_id_, frame_size);
         client_->GetLayer()->SetShowSurface(surface_id_, frame_size_in_dip);