Update from https://crrev.com/309415

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 <algorithm>
 #include <limits>
 #include <set>
 #include <utility>
@@ skipping 1171 matching lines @@
   mask->SetContentBounds(layer_bounds);
   mask->SetDrawsContent(true);
 
   SetupDrawPropertiesAndUpdateTiles(mask.get(), contents_scale, device_scale,
                                     page_scale, maximum_animation_scale,
                                     animating_transform);
   EXPECT_EQ(mask->HighResTiling()->contents_scale(), contents_scale);
   EXPECT_EQ(mask->num_tilings(), 1u);
 }
 
-TEST_F(PictureLayerImplTest, HugeMasksDontGetTiles) {
+TEST_F(PictureLayerImplTest, HugeMasksGetScaledDown) {
   base::TimeTicks time_ticks;
   time_ticks += base::TimeDelta::FromMilliseconds(1);
   host_impl_.SetCurrentBeginFrameArgs(
       CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE, time_ticks));
 
   gfx::Size tile_size(100, 100);
   gfx::Size layer_bounds(1000, 1000);
 
   scoped_refptr<FakePicturePileImpl> valid_pile =
       FakePicturePileImpl::CreateFilledPile(tile_size, layer_bounds);
@@ skipping 26 matching lines @@
   FakePictureLayerImpl* active_mask =
       static_cast<FakePictureLayerImpl*>(active_layer_->mask_layer());
 
   // Mask layers have a tiling with a single tile in it.
   EXPECT_EQ(1u, active_mask->HighResTiling()->AllTilesForTesting().size());
   // The mask resource exists.
   ResourceProvider::ResourceId mask_resource_id;
   gfx::Size mask_texture_size;
   active_mask->GetContentsResourceId(&mask_resource_id, &mask_texture_size);
   EXPECT_NE(0u, mask_resource_id);
-  EXPECT_EQ(mask_texture_size, active_mask->bounds());
+  EXPECT_EQ(active_mask->bounds(), mask_texture_size);
 
   // Drop resources and recreate them, still the same.
   pending_mask->ReleaseResources();
   active_mask->ReleaseResources();
   SetupDrawPropertiesAndUpdateTiles(active_mask, 1.f, 1.f, 1.f, 1.f, false);
   active_mask->HighResTiling()->CreateAllTilesForTesting();
   EXPECT_EQ(1u, active_mask->HighResTiling()->AllTilesForTesting().size());
   EXPECT_NE(0u, mask_resource_id);
-  EXPECT_EQ(mask_texture_size, active_layer_->bounds());
-
-  // Drop resources and recreate them, still the same.
-  pending_mask->ReleaseResources();
-  active_mask->ReleaseResources();
-  SetupDrawPropertiesAndUpdateTiles(active_mask, 1.f, 1.f, 1.f, 1.f, false);
-  active_mask->HighResTiling()->CreateAllTilesForTesting();
-  EXPECT_EQ(1u, active_mask->HighResTiling()->AllTilesForTesting().size());
-  EXPECT_NE(0u, mask_resource_id);
-  EXPECT_EQ(mask_texture_size, active_mask->bounds());
+  EXPECT_EQ(active_mask->bounds(), mask_texture_size);
 
   // Resize larger than the max texture size.
   int max_texture_size = host_impl_.GetRendererCapabilities().max_texture_size;
   gfx::Size huge_bounds(max_texture_size + 1, 10);
   scoped_refptr<FakePicturePileImpl> huge_pile =
       FakePicturePileImpl::CreateFilledPile(tile_size, huge_bounds);
 
   SetupPendingTree(huge_pile);
   pending_mask->SetBounds(huge_bounds);
   pending_mask->SetContentBounds(huge_bounds);
   pending_mask->SetRasterSourceOnPending(huge_pile, Region());
 
   time_ticks += base::TimeDelta::FromMilliseconds(1);
   host_impl_.SetCurrentBeginFrameArgs(
       CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE, time_ticks));
   host_impl_.pending_tree()->UpdateDrawProperties();
 
-  EXPECT_EQ(1.f, pending_mask->HighResTiling()->contents_scale());
+  // The mask tiling gets scaled down.
+  EXPECT_LT(pending_mask->HighResTiling()->contents_scale(), 1.f);
   EXPECT_EQ(1u, pending_mask->num_tilings());
 
   host_impl_.tile_manager()->InitializeTilesWithResourcesForTesting(
       pending_mask->HighResTiling()->AllTilesForTesting());
 
   ActivateTree();
 
-  // Mask layers have a tiling, but there should be no tiles in it.
-  EXPECT_EQ(0u, active_mask->HighResTiling()->AllTilesForTesting().size());
-  // The mask resource is empty.
-  active_layer_->GetContentsResourceId(&mask_resource_id, &mask_texture_size);
-  EXPECT_EQ(0u, mask_resource_id);
+  // Mask layers have a tiling with a single tile in it.
+  EXPECT_EQ(1u, active_mask->HighResTiling()->AllTilesForTesting().size());
+  // The mask resource exists.
+  active_mask->GetContentsResourceId(&mask_resource_id, &mask_texture_size);
+  EXPECT_NE(0u, mask_resource_id);
+  gfx::Size expected_size = active_mask->bounds();
+  expected_size.SetToMin(gfx::Size(max_texture_size, max_texture_size));
+  EXPECT_EQ(expected_size, mask_texture_size);
 
   // Drop resources and recreate them, still the same.
   pending_mask->ReleaseResources();
   active_mask->ReleaseResources();
   SetupDrawPropertiesAndUpdateTiles(active_mask, 1.f, 1.f, 1.f, 1.f, false);
   active_mask->HighResTiling()->CreateAllTilesForTesting();
-  EXPECT_EQ(0u, active_mask->HighResTiling()->AllTilesForTesting().size());
-  active_mask->GetContentsResourceId(&mask_resource_id, &mask_texture_size);
-  EXPECT_EQ(0u, mask_resource_id);
+  EXPECT_EQ(1u, active_mask->HighResTiling()->AllTilesForTesting().size());
+  EXPECT_NE(0u, mask_resource_id);
+  EXPECT_EQ(expected_size, mask_texture_size);
 
   // Do another activate, the same holds.
   SetupPendingTree(huge_pile);
   ActivateTree();
-  EXPECT_EQ(0u, active_mask->HighResTiling()->AllTilesForTesting().size());
+  EXPECT_EQ(1u, active_mask->HighResTiling()->AllTilesForTesting().size());
   active_layer_->GetContentsResourceId(&mask_resource_id, &mask_texture_size);
+  EXPECT_EQ(expected_size, mask_texture_size);
   EXPECT_EQ(0u, mask_resource_id);
+
+  // Resize even larger, so that the scale would be smaller than the minimum
+  // contents scale. Then the layer should no longer have any tiling.
+  float min_contents_scale = host_impl_.settings().minimum_contents_scale;
+  gfx::Size extra_huge_bounds(max_texture_size / min_contents_scale + 1, 10);
+  scoped_refptr<FakePicturePileImpl> extra_huge_pile =
+      FakePicturePileImpl::CreateFilledPile(tile_size, extra_huge_bounds);
+
+  SetupPendingTree(extra_huge_pile);
+  pending_mask->SetBounds(extra_huge_bounds);
+  pending_mask->SetContentBounds(extra_huge_bounds);
+  pending_mask->SetRasterSourceOnPending(extra_huge_pile, Region());
+
+  EXPECT_FALSE(pending_mask->CanHaveTilings());
+
+  time_ticks += base::TimeDelta::FromMilliseconds(1);
+  host_impl_.SetCurrentBeginFrameArgs(
+      CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE, time_ticks));
+  host_impl_.pending_tree()->UpdateDrawProperties();
+
+  EXPECT_EQ(0u, pending_mask->num_tilings());
 }
 
 TEST_F(PictureLayerImplTest, ScaledMaskLayer) {
   base::TimeTicks time_ticks;
   time_ticks += base::TimeDelta::FromMilliseconds(1);
   host_impl_.SetCurrentBeginFrameArgs(
       CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE, time_ticks));
 
   gfx::Size tile_size(100, 100);
   gfx::Size layer_bounds(1000, 1000);
@@ skipping 353 matching lines @@
   int num_outside = 0;
   for (PictureLayerTiling::CoverageIterator iter(
            pending_layer_->HighResTiling(), 1.f, gfx::Rect(layer_bounds));
        iter; ++iter) {
     if (!*iter)
       continue;
     Tile* tile = *iter;
     if (viewport_for_tile_priority.Intersects(iter.geometry_rect())) {
       num_inside++;
       // Mark everything in viewport for tile priority as ready to draw.
-      ManagedTileState::DrawInfo& draw_info = tile->draw_info();
+      TileDrawInfo& draw_info = tile->draw_info();
       draw_info.SetSolidColorForTesting(SK_ColorRED);
     } else {
       num_outside++;
       EXPECT_FALSE(tile->required_for_activation());
     }
   }
 
   EXPECT_GT(num_inside, 0);
   EXPECT_GT(num_outside, 0);
 
@@ skipping 1124 matching lines @@
   pending_layer_->draw_properties().visible_content_rect =
       gfx::Rect(0, 0, 500, 500);
   pending_layer_->UpdateTiles(Occlusion(), resourceless_software_draw);
 
   std::vector<Tile*> high_res_tiles =
       pending_layer_->HighResTiling()->AllTilesForTesting();
   for (std::vector<Tile*>::iterator tile_it = high_res_tiles.begin();
        tile_it != high_res_tiles.end();
        ++tile_it) {
     Tile* tile = *tile_it;
-    ManagedTileState::DrawInfo& draw_info = tile->draw_info();
+    TileDrawInfo& draw_info = tile->draw_info();
     draw_info.SetSolidColorForTesting(SK_ColorRED);
   }
 
   non_ideal_tile_count = 0;
   low_res_tile_count = 0;
   high_res_tile_count = 0;
   queue = pending_layer_->CreateRasterQueue(true);
   while (!queue->IsEmpty()) {
     Tile* tile = queue->Top();
     TilePriority priority = tile->priority(PENDING_TREE);
@@ skipping 766 matching lines @@
   EXPECT_EQ(
       gfx::Size(2500u, 5000u).ToString(),
       render_pass->shared_quad_state_list.front()->content_bounds.ToString());
   // The visible_content_rect should be scaled by the
   // MaximumTilingContentsScale on the layer.
   EXPECT_EQ(gfx::Rect(0u, 0u, 2500u, 5000u).ToString(),
             render_pass->shared_quad_state_list.front()
                 ->visible_content_rect.ToString());
 }
 
-TEST_F(PictureLayerImplTest, UpdateTilesForMasksWithNoVisibleContent) {
-  gfx::Size tile_size(400, 400);
-  gfx::Size bounds(100000, 100);
-
-  host_impl_.CreatePendingTree();
-
-  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl_.pending_tree(), 1);
-
-  scoped_refptr<FakePicturePileImpl> pending_pile =
-      FakePicturePileImpl::CreateFilledPile(tile_size, bounds);
-  scoped_ptr<FakePictureLayerImpl> layer_with_mask =
-      FakePictureLayerImpl::CreateWithRasterSource(host_impl_.pending_tree(), 2,
-                                                   pending_pile);
-  layer_with_mask->SetBounds(bounds);
-  layer_with_mask->SetContentBounds(bounds);
-
-  scoped_refptr<FakePicturePileImpl> mask_pile =
-      FakePicturePileImpl::CreateFilledPile(tile_size, bounds);
-  scoped_ptr<FakePictureLayerImpl> mask =
-      FakePictureLayerImpl::CreateMaskWithRasterSource(
-          host_impl_.pending_tree(), 3, mask_pile);
-  mask->SetBounds(bounds);
-  mask->SetContentBounds(bounds);
-  mask->SetDrawsContent(true);
-  layer_with_mask->SetMaskLayer(mask.Pass());
-
-  FakePictureLayerImpl* pending_mask =
-      static_cast<FakePictureLayerImpl*>(layer_with_mask->mask_layer());
-
-  scoped_ptr<FakePictureLayerImpl> child_of_layer_with_mask =
-      FakePictureLayerImpl::CreateWithRasterSource(host_impl_.pending_tree(), 4,
-                                                   pending_pile);
-  child_of_layer_with_mask->SetBounds(bounds);
-  child_of_layer_with_mask->SetContentBounds(bounds);
-  child_of_layer_with_mask->SetDrawsContent(true);
-  layer_with_mask->AddChild(child_of_layer_with_mask.Pass());
-  root->AddChild(layer_with_mask.Pass());
-
-  host_impl_.pending_tree()->SetRootLayer(root.Pass());
-
-  EXPECT_EQ(0u, pending_mask->num_tilings());
-  host_impl_.pending_tree()->UpdateDrawProperties();
-  EXPECT_NE(0u, pending_mask->num_tilings());
-}
-
 class PictureLayerImplTestWithDelegatingRenderer : public PictureLayerImplTest {
  public:
   PictureLayerImplTestWithDelegatingRenderer() : PictureLayerImplTest() {}
 
   void InitializeRenderer() override {
     host_impl_.InitializeRenderer(FakeOutputSurface::CreateDelegating3d());
   }
 };
 
 TEST_F(PictureLayerImplTestWithDelegatingRenderer,
@@ skipping 1094 matching lines @@
   result = layer->CalculateTileSize(gfx::Size(447, 400));
   EXPECT_EQ(result.width(), 448);
   EXPECT_EQ(result.height(), 448);
   result = layer->CalculateTileSize(gfx::Size(500, 499));
   EXPECT_EQ(result.width(), 512);
   EXPECT_EQ(result.height(), 500 + 2);
 }
 
 }  // namespace
 }  // namespace cc