exo: Implement zcr_linux_explicit_synchronization_v1

components/exo/surface.cc

Index: components/exo/surface.cc
diff --git a/components/exo/surface.cc b/components/exo/surface.cc
index 5f22ec6fd64ad5a361039368515743886f0a1530..d6bf4b4a04fedf8aaae20200e0f0f58f6a22876c 100644
--- a/components/exo/surface.cc
+++ b/components/exo/surface.cc
@@ -260,6 +260,12 @@ void Surface::Attach(Buffer* buffer) {
   pending_buffer_.Reset(buffer ? buffer->AsWeakPtr() : base::WeakPtr<Buffer>());
 }
 
+void Surface::SetAcquireFence(std::unique_ptr<gfx::GpuFence> fence) {
+  TRACE_EVENT1("exo", "Surface::FenceAcquire", "fence", !!fence);
+
+  pending_acquire_fence_ = std::move(fence);
+}
+
 void Surface::Damage(const gfx::Rect& damage) {
   TRACE_EVENT1("exo", "Surface::Damage", "damage", damage.ToString());
 
@@ -466,6 +472,7 @@ void Surface::CommitSurfaceHierarchy() {
     has_pending_contents_ = false;
 
     current_buffer_ = std::move(pending_buffer_);
+    acquire_fence_ = std::move(pending_acquire_fence_);
 
     UpdateResource(true);
   }
@@ -715,7 +722,8 @@ void Surface::UpdateResource(bool client_usage) {
   if (current_buffer_.buffer()) {
     texture_mailbox_release_callback =
         current_buffer_.buffer()->ProduceTextureMailbox(
-            &texture_mailbox, state_.only_visible_on_secure_output,
+            &texture_mailbox, acquire_fence_.get(),
+            state_.only_visible_on_secure_output,
             client_usage);
   }