Implement filter effects in Core Animation using CAFilters.

ui/accelerated_widget_mac/ca_layer_tree_unittest_mac.mm

Index: ui/accelerated_widget_mac/ca_layer_tree_unittest_mac.mm
diff --git a/ui/accelerated_widget_mac/ca_layer_tree_unittest_mac.mm b/ui/accelerated_widget_mac/ca_layer_tree_unittest_mac.mm
index 91283677e3cd00cc827204400dbf423a7505b1a9..2fcab68b53f8970ca77ddc9440e8f6aefd7b773e 100644
--- a/ui/accelerated_widget_mac/ca_layer_tree_unittest_mac.mm
+++ b/ui/accelerated_widget_mac/ca_layer_tree_unittest_mac.mm
@@ -39,6 +39,7 @@ struct CALayerProperties {
   float scale_factor = 1.0f;
   unsigned filter = GL_LINEAR;
   scoped_refptr<gl::GLImageIOSurface> gl_image;
+  ui::CARendererLayerParams::FilterEffects filter_effects;
 };
 
 scoped_refptr<gl::GLImageIOSurface> CreateGLImage(const gfx::Size& size,
@@ -62,12 +63,14 @@ scoped_refptr<gl::GLImageIOSurface> CreateGLImage(const gfx::Size& size,
 
 bool ScheduleCALayer(ui::CARendererLayerTree* tree,
                      CALayerProperties* properties) {
-  return tree->ScheduleCALayer(ui::CARendererLayerParams(
+  ui::CARendererLayerParams params = ui::CARendererLayerParams(
       properties->is_clipped, properties->clip_rect,
       properties->sorting_context_id, properties->transform,
       properties->gl_image.get(), properties->contents_rect, properties->rect,
       properties->background_color, properties->edge_aa_mask,
-      properties->opacity, properties->filter));
+      properties->opacity, properties->filter);
+  params.filter_effects = properties->filter_effects;
+  return tree->ScheduleCALayer(params);
 }
 
 void UpdateCALayerTree(std::unique_ptr<ui::CARendererLayerTree>& ca_layer_tree,
@@ -362,6 +365,34 @@ TEST_F(CALayerTreeTest, PropertyUpdates) {
     EXPECT_NSEQ(kCAFilterNearest, [content_layer magnificationFilter]);
   }
 
+  // Add every filter effect.
+  {
+    using FilterEffectType = ui::CARendererLayerParams::FilterEffectType;
+    for (int i = static_cast<int>(FilterEffectType::MIN);
+         i <= static_cast<int>(FilterEffectType::MAX); i++) {
+      ui::CARendererLayerParams::FilterEffect filter_effect;
+      filter_effect.type = static_cast<FilterEffectType>(i);
+      filter_effect.amount = i * 0.05 + 0.1;
+      properties.filter_effects.push_back(filter_effect);
+    }
+    UpdateCALayerTree(ca_layer_tree, &properties, superlayer_);
+
+    // Validate the content layer.
+    EXPECT_EQ(9u, [[content_layer filters] count]);
+    EXPECT_GT([content_layer shadowRadius], 0.0);
+    EXPECT_LT([content_layer shadowRadius], 1.0);
+  }
+
+  // Remove every filter effect.
+  {
+    properties.filter_effects.clear();
+    UpdateCALayerTree(ca_layer_tree, &properties, superlayer_);
+
+    // Validate the content layer.
+    EXPECT_EQ(0u, [[content_layer filters] count]);
+    EXPECT_EQ(0.0, [content_layer shadowRadius]);
+  }
+
   // Add the clipping and IOSurface contents back.
   {
     properties.is_clipped = true;