gpu: Add sync token dependencies to flush metadata.

cc/raster/gpu_raster_buffer_provider.cc

Index: cc/raster/gpu_raster_buffer_provider.cc
diff --git a/cc/raster/gpu_raster_buffer_provider.cc b/cc/raster/gpu_raster_buffer_provider.cc
index 2e253dc06134e7ad0160c66ac68565d167e5d51c..208068a8103ecc6d0c9e91e588501945aeb0b1da 100644
--- a/cc/raster/gpu_raster_buffer_provider.cc
+++ b/cc/raster/gpu_raster_buffer_provider.cc
@@ -200,8 +200,8 @@ bool GpuRasterBufferProvider::IsResourceReadyToDraw(
   if (!sync_token.HasData())
     return true;
 
-  // IsSyncTokenSignalled is threadsafe, no need for worker context lock.
-  return worker_context_provider_->ContextSupport()->IsSyncTokenSignalled(
+  // IsSyncTokenSignaled is thread-safe, no need for worker context lock.
+  return worker_context_provider_->ContextSupport()->IsSyncTokenSignaled(
       sync_token);
 }