[compositorworker] compositor proxy mutation updates underlying layers

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/layer_tree_host_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 466 matching lines @@
       // frame.
       SetNeedsRedraw();
     }
   }
 }
 
 bool LayerTreeHostImpl::Mutate(base::TimeTicks monotonic_time) {
   if (!mutator_)
     return false;
   TRACE_EVENT0("compositor-worker", "LayerTreeHostImpl::Mutate");
-  if (mutator_->Mutate(monotonic_time))
+  if (mutator_->Mutate(monotonic_time, active_tree()))
     client_->SetNeedsOneBeginImplFrameOnImplThread();
   return true;
 }
 
 void LayerTreeHostImpl::SetNeedsMutate() {
   TRACE_EVENT0("compositor-worker", "LayerTreeHostImpl::SetNeedsMutate");
   client_->SetNeedsOneBeginImplFrameOnImplThread();
 }
 
 bool LayerTreeHostImpl::PrepareTiles() {
@@ skipping 3531 matching lines @@
     const {
   return fixed_raster_scale_attempted_scale_change_history_.count() >=
          kFixedRasterScaleAttemptedScaleChangeThreshold;
 }
 
 void LayerTreeHostImpl::SetFixedRasterScaleAttemptedToChangeScale() {
   fixed_raster_scale_attempted_scale_change_history_.set(0);
 }
 
 }  // namespace cc