cc: Clean up root_layer code in LTI

cc/tiles/tile_manager_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 <stddef.h>
 #include <stdint.h>
 
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 1742 matching lines @@
 
   // Steal from the recycled tree.
   std::unique_ptr<FakePictureLayerImpl> pending_layer =
       FakePictureLayerImpl::CreateWithRasterSource(pending_tree, kLayerId,
                                                    pending_raster_source);
   pending_layer->SetDrawsContent(true);
   pending_layer->SetHasRenderSurface(true);
 
   // The bounds() just mirror the raster source size.
   pending_layer->SetBounds(pending_layer->raster_source()->GetSize());
-  pending_tree->SetRootLayer(std::move(pending_layer));
+  pending_tree->SetRootLayerForTesting(std::move(pending_layer));
 
   // Add tilings/tiles for the layer.
   host_impl()->pending_tree()->BuildLayerListAndPropertyTreesForTesting();
   host_impl()->pending_tree()->UpdateDrawProperties(
       false /* update_lcd_text */);
 
   // Build the raster queue and invalidate the top tile.
   std::unique_ptr<RasterTilePriorityQueue> queue(host_impl()->BuildRasterQueue(
       SAME_PRIORITY_FOR_BOTH_TREES, RasterTilePriorityQueue::Type::ALL));
   EXPECT_FALSE(queue->IsEmpty());
@@ skipping 76 matching lines @@
 
   // Steal from the recycled tree.
   std::unique_ptr<FakePictureLayerImpl> pending_layer =
       FakePictureLayerImpl::CreateWithRasterSource(pending_tree, kLayerId,
                                                    pending_raster_source);
   pending_layer->SetDrawsContent(true);
   pending_layer->SetHasRenderSurface(true);
 
   // The bounds() just mirror the raster source size.
   pending_layer->SetBounds(pending_layer->raster_source()->GetSize());
-  pending_tree->SetRootLayer(std::move(pending_layer));
+  pending_tree->SetRootLayerForTesting(std::move(pending_layer));
 
   // Add tilings/tiles for the layer.
   host_impl->pending_tree()->BuildLayerListAndPropertyTreesForTesting();
   host_impl->pending_tree()->UpdateDrawProperties(false /* update_lcd_text */);
 
   // Build the raster queue and invalidate the top tile.
   std::unique_ptr<RasterTilePriorityQueue> queue(host_impl->BuildRasterQueue(
       SAME_PRIORITY_FOR_BOTH_TREES, RasterTilePriorityQueue::Type::ALL));
   EXPECT_FALSE(queue->IsEmpty());
   queue->Top().tile()->SetInvalidated(gfx::Rect(), kInvalidatedId);
@@ skipping 15 matching lines @@
 }
 
 // Ensures that the tile manager does not attempt to reuse tiles when partial
 // raster is disabled.
 TEST_F(TileManagerTest, PartialRasterSuccessfullyDisabled) {
   RunPartialRasterCheck(TakeHostImpl(), false /* partial_raster_enabled */);
 }
 
 }  // namespace
 }  // namespace cc