Revert of cc: Add image decode queue functionality to image manager.

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index ba824383ed35f2e6808c4829ed27f541141175cf..b2fd2e17215b8e00a617b949a2a20be090cd5e37 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -199,7 +199,7 @@
     host_impl_ = LayerTreeHostImpl::Create(
         settings, this, task_runner_provider, &stats_instrumentation_,
         &task_graph_runner_,
-        AnimationHost::CreateForTesting(ThreadInstance::IMPL), 0, nullptr);
+        AnimationHost::CreateForTesting(ThreadInstance::IMPL), 0);
     compositor_frame_sink_ = std::move(compositor_frame_sink);
     host_impl_->SetVisible(true);
     bool init = host_impl_->InitializeRenderer(compositor_frame_sink_.get());
@@ -2709,8 +2709,7 @@
                           rendering_stats_instrumentation,
                           task_graph_runner,
                           AnimationHost::CreateForTesting(ThreadInstance::IMPL),
-                          0,
-                          nullptr) {}
+                          0) {}
 
   BeginFrameArgs CurrentBeginFrameArgs() const override {
     return CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE, 0, 1,
@@ -7580,7 +7579,7 @@
       LayerTreeHostImpl::Create(
           settings, this, &task_runner_provider_, &stats_instrumentation_,
           &task_graph_runner_,
-          AnimationHost::CreateForTesting(ThreadInstance::IMPL), 0, nullptr);
+          AnimationHost::CreateForTesting(ThreadInstance::IMPL), 0);
   layer_tree_host_impl->SetVisible(true);
   layer_tree_host_impl->InitializeRenderer(compositor_frame_sink.get());
   layer_tree_host_impl->WillBeginImplFrame(
@@ -7709,7 +7708,7 @@
   std::unique_ptr<LayerTreeHostImpl> my_host_impl = LayerTreeHostImpl::Create(
       settings, client, task_runner_provider, stats_instrumentation,
       task_graph_runner, AnimationHost::CreateForTesting(ThreadInstance::IMPL),
-      0, nullptr);
+      0);
   my_host_impl->SetVisible(true);
   my_host_impl->InitializeRenderer(compositor_frame_sink);
   my_host_impl->WillBeginImplFrame(
@@ -8177,7 +8176,7 @@
   host_impl_ = LayerTreeHostImpl::Create(
       settings, this, &task_runner_provider_, &stats_instrumentation_,
       &task_graph_runner_,
-      AnimationHost::CreateForTesting(ThreadInstance::IMPL), 0, nullptr);
+      AnimationHost::CreateForTesting(ThreadInstance::IMPL), 0);
 
   // Gpu compositing.
   compositor_frame_sink_ =
@@ -11633,7 +11632,7 @@
   host_impl_ = LayerTreeHostImpl::Create(
       settings, this, &task_runner_provider_, &stats_instrumentation_,
       &task_graph_runner_,
-      AnimationHost::CreateForTesting(ThreadInstance::IMPL), 0, nullptr);
+      AnimationHost::CreateForTesting(ThreadInstance::IMPL), 0);
   host_impl_->SetVisible(true);
 
   // InitializeRenderer with a gpu-raster enabled output surface.