Clean LayerImpl's scroll offset callers in unit tests.

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 237 matching lines @@
 
   DCHECK(task_runner_provider_->IsImplThread());
   DidVisibilityChange(this, visible_);
 
   SetDebugState(settings.initial_debug_state);
 
   // LTHI always has an active tree.
   active_tree_ =
       LayerTreeImpl::create(this, new SyncedProperty<ScaleGroup>(),
                             new SyncedTopControls, new SyncedElasticOverscroll);
+  active_tree_->property_trees()->is_active = true;
 
   viewport_ = Viewport::Create(this);
 
   TRACE_EVENT_OBJECT_CREATED_WITH_ID(
       TRACE_DISABLED_BY_DEFAULT("cc.debug"), "cc::LayerTreeHostImpl", id_);
 
   top_controls_manager_ =
       TopControlsManager::Create(this,
                                  settings.top_controls_show_threshold,
                                  settings.top_controls_hide_threshold);
@@ skipping 934 matching lines @@
   NOTREACHED();
 }
 
 void LayerTreeHostImpl::ResetTreesForTesting() {
   if (active_tree_)
     active_tree_->DetachLayerTree();
   active_tree_ =
       LayerTreeImpl::create(this, active_tree()->page_scale_factor(),
                             active_tree()->top_controls_shown_ratio(),
                             active_tree()->elastic_overscroll());
+  active_tree_->property_trees()->is_active = true;
   if (pending_tree_)
     pending_tree_->DetachLayerTree();
   pending_tree_ = nullptr;
   if (recycle_tree_)
     recycle_tree_->DetachLayerTree();
   recycle_tree_ = nullptr;
 }
 
 size_t LayerTreeHostImpl::SourceAnimationFrameNumberForTesting() const {
   return fps_counter_->current_frame_number();
@@ skipping 2741 matching lines @@
   return task_runner_provider_->HasImplThread();
 }
 
 bool LayerTreeHostImpl::CommitToActiveTree() const {
   // In single threaded mode we skip the pending tree and commit directly to the
   // active tree.
   return !task_runner_provider_->HasImplThread();
 }
 
 }  // namespace cc