Determine a layer's IsAffectedByPageScale property without using Layer Tree

cc/layers/picture_layer_impl_unittest.cc

 // Copyright 2013 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/layers/picture_layer_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <limits>
@@ skipping 246 matching lines @@
       if (!tile_size.IsEmpty())
         pending_layer->set_fixed_tile_size(tile_size);
     }
     pending_root->SetForceRenderSurface(true);
     // The bounds() just mirror the raster source size.
     pending_layer->SetBounds(raster_source->GetSize());
     pending_layer->SetRasterSourceOnPending(raster_source, invalidation);
 
     pending_root->AddChild(std::move(pending_layer));
     pending_tree->SetRootLayer(std::move(pending_root));
+    pending_tree->SetViewportLayersFromIds(
+        Layer::INVALID_ID, pending_tree->root_layer()->id(), Layer::INVALID_ID,
+        Layer::INVALID_ID);
 
     pending_layer_ = static_cast<FakePictureLayerImpl*>(
         host_impl_.pending_tree()->LayerById(id_));
 
     // Add tilings/tiles for the layer.
     bool update_lcd_text = false;
     RebuildPropertyTreesOnPendingTree();
     host_impl_.pending_tree()->UpdateDrawProperties(update_lcd_text);
   }
 
@@ skipping 4776 matching lines @@
   // New low res tiling.
   EXPECT_TRUE(tilings->tiling_at(2)->may_contain_low_resolution_tiles());
 
   // This tiling will be high res now, it won't contain low res content since it
   // was all destroyed.
   EXPECT_FALSE(tilings->tiling_at(1)->may_contain_low_resolution_tiles());
 }
 
 }  // namespace
 }  // namespace cc