cc: Add image decode queue functionality to image manager.

cc/test/fake_layer_tree_host_impl.cc

Index: cc/test/fake_layer_tree_host_impl.cc
diff --git a/cc/test/fake_layer_tree_host_impl.cc b/cc/test/fake_layer_tree_host_impl.cc
index d6b2cd0744d2b9782134f6cc3c13ebca5909169c..63a32fdb2877fec8cf8e202ddfdc4ffe054b1bae 100644
--- a/cc/test/fake_layer_tree_host_impl.cc
+++ b/cc/test/fake_layer_tree_host_impl.cc
@@ -31,7 +31,8 @@ FakeLayerTreeHostImpl::FakeLayerTreeHostImpl(
                         &stats_instrumentation_,
                         task_graph_runner,
                         AnimationHost::CreateForTesting(ThreadInstance::IMPL),
-                        0),
+                        0,
+                        nullptr),
       notify_tile_state_changed_called_(false) {
   // Explicitly clear all debug settings.
   SetDebugState(LayerTreeDebugState());