Update from https://crrev.com/309717

cc/trees/damage_tracker_unittest.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/damage_tracker.h"
 
 #include "cc/base/math_util.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/output/filter_operation.h"
 #include "cc/output/filter_operations.h"
@@ skipping 68 matching lines @@
   scoped_ptr<LayerImpl> CreateTestTreeWithOneSurface() {
     scoped_ptr<LayerImpl> root =
             LayerImpl::Create(host_impl_.active_tree(), 1);
     scoped_ptr<LayerImpl> child =
             LayerImpl::Create(host_impl_.active_tree(), 2);
 
     root->SetPosition(gfx::PointF());
     root->SetBounds(gfx::Size(500, 500));
     root->SetContentBounds(gfx::Size(500, 500));
     root->SetDrawsContent(true);
-    root->CreateRenderSurface();
+    root->SetHasRenderSurface(true);
     root->render_surface()->SetContentRect(gfx::Rect(0, 0, 500, 500));
 
     child->SetPosition(gfx::PointF(100.f, 100.f));
     child->SetBounds(gfx::Size(30, 30));
     child->SetContentBounds(gfx::Size(30, 30));
     child->SetDrawsContent(true);
     root->AddChild(child.Pass());
 
     return root.Pass();
   }
@@ skipping 11 matching lines @@
             LayerImpl::Create(host_impl_.active_tree(), 3);
     scoped_ptr<LayerImpl> grand_child1 =
             LayerImpl::Create(host_impl_.active_tree(), 4);
     scoped_ptr<LayerImpl> grand_child2 =
             LayerImpl::Create(host_impl_.active_tree(), 5);
 
     root->SetPosition(gfx::PointF());
     root->SetBounds(gfx::Size(500, 500));
     root->SetContentBounds(gfx::Size(500, 500));
     root->SetDrawsContent(true);
-    root->CreateRenderSurface();
+    root->SetHasRenderSurface(true);
     root->render_surface()->SetContentRect(gfx::Rect(0, 0, 500, 500));
 
     child1->SetPosition(gfx::PointF(100.f, 100.f));
     child1->SetBounds(gfx::Size(30, 30));
     child1->SetContentBounds(gfx::Size(30, 30));
     // With a child that draws_content, opacity will cause the layer to create
     // its own RenderSurface. This layer does not draw, but is intended to
-    // create its own RenderSurface. TODO: setting opacity and
-    // ForceRenderSurface may be redundant here.
-    child1->SetOpacity(0.5f);
+    // create its own RenderSurface.
     child1->SetDrawsContent(false);
-    child1->SetForceRenderSurface(true);
+    child1->SetHasRenderSurface(true);
 
     child2->SetPosition(gfx::PointF(11.f, 11.f));
     child2->SetBounds(gfx::Size(18, 18));
     child2->SetContentBounds(gfx::Size(18, 18));
     child2->SetDrawsContent(true);
 
     grand_child1->SetPosition(gfx::PointF(200.f, 200.f));
     grand_child1->SetBounds(gfx::Size(6, 8));
     grand_child1->SetContentBounds(gfx::Size(6, 8));
     grand_child1->SetDrawsContent(true);
@@ skipping 391 matching lines @@
   // Allow us to set damage on child too.
   child->SetDrawsContent(true);
 
   skia::RefPtr<SkImageFilter> filter = skia::AdoptRef(
       SkBlurImageFilter::Create(SkIntToScalar(2), SkIntToScalar(2)));
   FilterOperations filters;
   filters.Append(FilterOperation::CreateReferenceFilter(filter));
 
   // Setting the filter will damage the whole surface.
   ClearDamageForAllSurfaces(root.get());
+  child->SetHasRenderSurface(true);
   child->SetFilters(filters);
   EmulateDrawingOneFrame(root.get());
   root_damage_rect =
           root->render_surface()->damage_tracker()->current_damage_rect();
   child_damage_rect =
           child->render_surface()->damage_tracker()->current_damage_rect();
   EXPECT_EQ(gfx::Rect(100, 100, 30, 30).ToString(),
             root_damage_rect.ToString());
   EXPECT_EQ(gfx::Rect(30, 30).ToString(), child_damage_rect.ToString());
 
@@ skipping 364 matching lines @@
 
 TEST_F(DamageTrackerTest, VerifyDamageForAddingAndRemovingRenderSurfaces) {
   scoped_ptr<LayerImpl> root = CreateAndSetUpTestTreeWithTwoSurfaces();
   LayerImpl* child1 = root->children()[0];
   gfx::Rect child_damage_rect;
   gfx::Rect root_damage_rect;
 
   // CASE 1: If a descendant surface disappears, its entire old area becomes
   //         exposed.
   ClearDamageForAllSurfaces(root.get());
-  child1->SetOpacity(1.f);
-  child1->SetForceRenderSurface(false);
+  child1->SetHasRenderSurface(false);
   EmulateDrawingOneFrame(root.get());
 
   // Sanity check that there is only one surface now.
   ASSERT_FALSE(child1->render_surface());
   ASSERT_EQ(4u, root->render_surface()->layer_list().size());
 
   root_damage_rect =
           root->render_surface()->damage_tracker()->current_damage_rect();
   EXPECT_EQ(gfx::Rect(290, 290, 16, 18).ToString(),
             root_damage_rect.ToString());
 
   // CASE 2: If a descendant surface appears, its entire old area becomes
   //         exposed.
 
   // Cycle one frame of no change, just to sanity check that the next rect is
   // not because of the old damage state.
   ClearDamageForAllSurfaces(root.get());
   EmulateDrawingOneFrame(root.get());
   root_damage_rect =
           root->render_surface()->damage_tracker()->current_damage_rect();
   EXPECT_TRUE(root_damage_rect.IsEmpty());
 
   // Then change the tree so that the render surface is added back.
   ClearDamageForAllSurfaces(root.get());
-  child1->SetOpacity(0.5f);
-  child1->SetForceRenderSurface(true);
+  child1->SetHasRenderSurface(true);
+
   EmulateDrawingOneFrame(root.get());
 
   // Sanity check that there is a new surface now.
   ASSERT_TRUE(child1->render_surface());
   EXPECT_EQ(3u, root->render_surface()->layer_list().size());
   EXPECT_EQ(2u, child1->render_surface()->layer_list().size());
 
   child_damage_rect =
           child1->render_surface()->damage_tracker()->current_damage_rect();
   root_damage_rect =
@@ skipping 82 matching lines @@
   //
   ClearDamageForAllSurfaces(root.get());
   {
     scoped_ptr<LayerImpl> grand_child1_replica =
             LayerImpl::Create(host_impl_.active_tree(), 7);
     grand_child1_replica->SetPosition(gfx::PointF());
     gfx::Transform reflection;
     reflection.Scale3d(-1.0, 1.0, 1.0);
     grand_child1_replica->SetTransform(reflection);
     grand_child1->SetReplicaLayer(grand_child1_replica.Pass());
+    grand_child1->SetHasRenderSurface(true);
   }
   EmulateDrawingOneFrame(root.get());
 
   gfx::Rect grand_child_damage_rect =
       grand_child1->render_surface()->damage_tracker()->current_damage_rect();
   gfx::Rect child_damage_rect =
       child1->render_surface()->damage_tracker()->current_damage_rect();
   gfx::Rect root_damage_rect =
       root->render_surface()->damage_tracker()->current_damage_rect();
 
@@ skipping 30 matching lines @@
   EXPECT_EQ(gfx::Rect(6, 8).ToString(), grand_child_damage_rect.ToString());
   EXPECT_EQ(gfx::Rect(189, 200, 17, 13).ToString(),
             child_damage_rect.ToString());
   EXPECT_EQ(gfx::Rect(289, 300, 17, 13).ToString(),
             root_damage_rect.ToString());
 
   // CASE 3: removing the reflection should cause the entire region including
   //         reflection to damage the target surface.
   ClearDamageForAllSurfaces(root.get());
   grand_child1->SetReplicaLayer(nullptr);
+  grand_child1->SetHasRenderSurface(false);
   EmulateDrawingOneFrame(root.get());
   ASSERT_EQ(old_content_rect.width(),
             child1->render_surface()->content_rect().width());
   ASSERT_EQ(old_content_rect.height(),
             child1->render_surface()->content_rect().height());
 
   EXPECT_FALSE(grand_child1->render_surface());
   child_damage_rect =
           child1->render_surface()->damage_tracker()->current_damage_rect();
   root_damage_rect =
@@ skipping 14 matching lines @@
   ClearDamageForAllSurfaces(root.get());
 
   // Set up the mask layer.
   {
     scoped_ptr<LayerImpl> mask_layer =
             LayerImpl::Create(host_impl_.active_tree(), 3);
     mask_layer->SetPosition(child->position());
     mask_layer->SetBounds(child->bounds());
     mask_layer->SetContentBounds(child->bounds());
     child->SetMaskLayer(mask_layer.Pass());
+    child->SetHasRenderSurface(true);
   }
   LayerImpl* mask_layer = child->mask_layer();
 
   // Add opacity and a grand_child so that the render surface persists even
   // after we remove the mask.
-  child->SetOpacity(0.5f);
   {
     scoped_ptr<LayerImpl> grand_child =
             LayerImpl::Create(host_impl_.active_tree(), 4);
     grand_child->SetPosition(gfx::PointF(2.f, 2.f));
     grand_child->SetBounds(gfx::Size(2, 2));
     grand_child->SetContentBounds(gfx::Size(2, 2));
     grand_child->SetDrawsContent(true);
     child->AddChild(grand_child.Pass());
   }
   EmulateDrawingOneFrame(root.get());
 
-  // Sanity check that a new surface was created for the child.
-  ASSERT_TRUE(child->render_surface());
-
   // CASE 1: the update_rect on a mask layer should damage the entire target
   //         surface.
   ClearDamageForAllSurfaces(root.get());
   mask_layer->SetUpdateRect(gfx::Rect(1, 2, 3, 4));
   EmulateDrawingOneFrame(root.get());
   gfx::Rect child_damage_rect =
       child->render_surface()->damage_tracker()->current_damage_rect();
   EXPECT_EQ(gfx::Rect(30, 30).ToString(), child_damage_rect.ToString());
 
   // CASE 2: a property change on the mask layer should damage the entire
@@ skipping 53 matching lines @@
 
   // Create a reflection about the left edge of grand_child1.
   {
     scoped_ptr<LayerImpl> grand_child1_replica =
             LayerImpl::Create(host_impl_.active_tree(), 6);
     grand_child1_replica->SetPosition(gfx::PointF());
     gfx::Transform reflection;
     reflection.Scale3d(-1.0, 1.0, 1.0);
     grand_child1_replica->SetTransform(reflection);
     grand_child1->SetReplicaLayer(grand_child1_replica.Pass());
+    grand_child1->SetHasRenderSurface(true);
   }
   LayerImpl* grand_child1_replica = grand_child1->replica_layer();
 
   // Set up the mask layer on the replica layer
   {
     scoped_ptr<LayerImpl> replica_mask_layer =
             LayerImpl::Create(host_impl_.active_tree(), 7);
     replica_mask_layer->SetPosition(gfx::PointF());
     replica_mask_layer->SetBounds(grand_child1->bounds());
     replica_mask_layer->SetContentBounds(grand_child1->bounds());
@@ skipping 57 matching lines @@
             LayerImpl::Create(host_impl_.active_tree(), 6);
     grand_child1_replica->SetPosition(gfx::PointF());
 
     // This is the anchor being tested.
     grand_child1_replica->SetTransformOrigin(
         gfx::Point3F(grand_child1->bounds().width(), 0.f, 0.f));
     gfx::Transform reflection;
     reflection.Scale3d(-1.0, 1.0, 1.0);
     grand_child1_replica->SetTransform(reflection);
     grand_child1->SetReplicaLayer(grand_child1_replica.Pass());
+    grand_child1->SetHasRenderSurface(true);
   }
   LayerImpl* grand_child1_replica = grand_child1->replica_layer();
 
   // Set up the mask layer on the replica layer
   {
     scoped_ptr<LayerImpl> replica_mask_layer =
             LayerImpl::Create(host_impl_.active_tree(), 7);
     replica_mask_layer->SetPosition(gfx::PointF());
     // Note: this is not the transform origin being tested.
     replica_mask_layer->SetBounds(grand_child1->bounds());
@@ skipping 47 matching lines @@
   root_damage_rect =
       root->render_surface()->damage_tracker()->current_damage_rect();
   EXPECT_EQ(gfx::Rect(30, 31, 14, 15).ToString(), root_damage_rect.ToString());
 }
 
 TEST_F(DamageTrackerTest, VerifyDamageForEmptyLayerList) {
   // Though it should never happen, its a good idea to verify that the damage
   // tracker does not crash when it receives an empty layer_list.
 
   scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl_.active_tree(), 1);
-  root->CreateRenderSurface();
+  root->SetHasRenderSurface(true);
+  root->draw_properties().render_target = root.get();
 
   ASSERT_TRUE(root == root->render_target());
   RenderSurfaceImpl* target_surface = root->render_surface();
 
   LayerImplList empty_list;
   target_surface->damage_tracker()->UpdateDamageTrackingState(
       empty_list,
       target_surface->OwningLayerId(),
       false,
       gfx::Rect(),
@@ skipping 71 matching lines @@
     gfx::Rect root_damage_rect =
         root->render_surface()->damage_tracker()->current_damage_rect();
     gfx::Rect damage_we_care_about = gfx::Rect(i, i);
     EXPECT_LE(damage_we_care_about.right(), root_damage_rect.right());
     EXPECT_LE(damage_we_care_about.bottom(), root_damage_rect.bottom());
   }
 }
 
 }  // namespace
 }  // namespace cc