Determine a layer's IsAffectedByPageScale property without using Layer Tree

cc/layers/picture_image_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_image_layer_impl.h"
 
 #include "base/thread_task_runner_handle.h"
 #include "cc/layers/append_quads_data.h"
 #include "cc/quads/draw_quad.h"
 #include "cc/test/fake_display_list_raster_source.h"
@@ skipping 90 matching lines @@
   TestSharedBitmapManager shared_bitmap_manager_;
   TestTaskGraphRunner task_graph_runner_;
   scoped_ptr<OutputSurface> output_surface_;
   FakeLayerTreeHostImpl host_impl_;
 };
 
 TEST_F(PictureImageLayerImplTest, CalculateContentsScale) {
   scoped_ptr<TestablePictureImageLayerImpl> layer(CreateLayer(1, PENDING_TREE));
   layer->SetDrawsContent(true);
 
+  TestablePictureImageLayerImpl* layer_ptr = layer.get();
+  host_impl_.pending_tree()->SetRootLayer(std::move(layer));
+  host_impl_.pending_tree()->BuildPropertyTreesForTesting();
+
   gfx::Rect viewport(100, 200);
-  SetupDrawPropertiesAndUpdateTiles(
-      layer.get(), 2.f, 3.f, 4.f, 1.f, false, viewport);
-  EXPECT_FLOAT_EQ(1.f, layer->MaximumTilingContentsScale());
+  SetupDrawPropertiesAndUpdateTiles(layer_ptr, 2.f, 3.f, 4.f, 1.f, false,
+                                    viewport);
+  EXPECT_FLOAT_EQ(1.f, layer_ptr->MaximumTilingContentsScale());
 }
 
 TEST_F(PictureImageLayerImplTest, IgnoreIdealContentScale) {
   scoped_ptr<TestablePictureImageLayerImpl> pending_layer(
       CreateLayer(1, PENDING_TREE));
   pending_layer->SetDrawsContent(true);
 
   gfx::Rect viewport(100, 200);
 
+  TestablePictureImageLayerImpl* pending_layer_ptr = pending_layer.get();
+  host_impl_.pending_tree()->SetRootLayer(std::move(pending_layer));
+  host_impl_.pending_tree()->BuildPropertyTreesForTesting();
+
   // Set PictureLayerImpl::ideal_contents_scale_ to 2.f which is not equal
   // to the content scale used by PictureImageLayerImpl.
   const float suggested_ideal_contents_scale = 2.f;
   const float device_scale_factor = 3.f;
   const float page_scale_factor = 4.f;
   const float maximum_animation_contents_scale = 1.f;
   const bool animating_transform_to_screen = false;
-  SetupDrawPropertiesAndUpdateTiles(pending_layer.get(),
-                                    suggested_ideal_contents_scale,
-                                    device_scale_factor,
-                                    page_scale_factor,
-                                    maximum_animation_contents_scale,
-                                    animating_transform_to_screen,
-                                    viewport);
-  EXPECT_EQ(1.f, pending_layer->tilings()->tiling_at(0)->contents_scale());
+  SetupDrawPropertiesAndUpdateTiles(
+      pending_layer_ptr, suggested_ideal_contents_scale, device_scale_factor,
+      page_scale_factor, maximum_animation_contents_scale,
+      animating_transform_to_screen, viewport);
+  EXPECT_EQ(1.f, pending_layer_ptr->tilings()->tiling_at(0)->contents_scale());
 
   // Push to active layer.
-  host_impl_.pending_tree()->SetRootLayer(std::move(pending_layer));
   host_impl_.ActivateSyncTree();
 
   TestablePictureImageLayerImpl* active_layer =
       static_cast<TestablePictureImageLayerImpl*>(
           host_impl_.active_tree()->root_layer());
   SetupDrawPropertiesAndUpdateTiles(active_layer,
                                     suggested_ideal_contents_scale,
                                     device_scale_factor,
                                     page_scale_factor,
                                     maximum_animation_contents_scale,
@@ skipping 13 matching lines @@
   active_layer->DidDraw(nullptr);
 
   EXPECT_EQ(DrawQuad::TILED_CONTENT, render_pass->quad_list.front()->material);
 
   // Tiles are ready at correct scale, so should not set had_incomplete_tile.
   EXPECT_EQ(0, data.num_incomplete_tiles);
 }
 
 }  // namespace
 }  // namespace cc