cc: Move tiling management out of draw properties calculation.

cc/trees/layer_tree_host_common_unittest.cc

Index: cc/trees/layer_tree_host_common_unittest.cc
diff --git a/cc/trees/layer_tree_host_common_unittest.cc b/cc/trees/layer_tree_host_common_unittest.cc
index 43d94da6d9a9dc166ddad829fdaba93e04a39a10..4f9b5f34ed3016c1c1233eb2ca53153ba2b93d89 100644
--- a/cc/trees/layer_tree_host_common_unittest.cc
+++ b/cc/trees/layer_tree_host_common_unittest.cc
@@ -8311,5 +8311,75 @@ TEST_F(LayerTreeHostCommonTest, RenderSurfaceLayerListMembership) {
   GatherDrawnLayers(render_surface_layer_list_impl(), &actual);
   EXPECT_EQ(expected, actual);
 }
+
+TEST_F(LayerTreeHostCommonTest, VerifyLayerDrawProperties) {

[danakj, 2014/05/23 17:07:34]

how about name this "DrawPropertyScales"

The "Verify" in a test name is redundant, it's a test, it always verifies.

+  FakeImplProxy proxy;
+  TestSharedBitmapManager shared_bitmap_manager;
+  FakeLayerTreeHostImpl host_impl(&proxy, &shared_bitmap_manager);
+
+  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl.active_tree(), 1);
+  LayerImpl* root_layer = root.get();
+  scoped_ptr<LayerImpl> child1 = LayerImpl::Create(host_impl.active_tree(), 2);
+  LayerImpl* child1_layer = child1.get();
+  scoped_ptr<LayerImpl> child2 = LayerImpl::Create(host_impl.active_tree(), 3);
+  LayerImpl* child2_layer = child2.get();
+
+  root->AddChild(child1.Pass());
+  root->AddChild(child2.Pass());
+
+  gfx::Transform identity_matrix, scale_transform_child1,
+      scale_transform_child2;
+  scale_transform_child1.Scale(2, 3);
+  scale_transform_child2.Scale(4, 5);
+
+  SetLayerPropertiesForTesting(root_layer,
+                               identity_matrix,
+                               gfx::PointF(),
+                               gfx::PointF(),
+                               gfx::Size(),
+                               true,
+                               false);
+  SetLayerPropertiesForTesting(child1_layer,
+                               scale_transform_child1,
+                               gfx::PointF(),
+                               gfx::PointF(),
+                               gfx::Size(),
+                               true,
+                               false);
+
+  TransformOperations scale;
+  scale.AppendScale(5.f, 8.f, 3.f);
+
+  AddAnimatedTransformToLayer(child2_layer, 1.0, TransformOperations(), scale);
+  SetLayerPropertiesForTesting(child2_layer,
+                               scale_transform_child2,
+                               gfx::PointF(),
+                               gfx::PointF(),
+                               gfx::Size(),
+                               true,
+                               false);
+
+  ExecuteCalculateDrawProperties(root_layer);
+
+  EXPECT_FLOAT_EQ(1.f, root_layer->draw_properties().ideal_contents_scale);
+  EXPECT_FLOAT_EQ(3.f, child1_layer->draw_properties().ideal_contents_scale);
+  EXPECT_FLOAT_EQ(5.f, child2_layer->draw_properties().ideal_contents_scale);
+
+  EXPECT_FLOAT_EQ(
+      0.f, root_layer->draw_properties().maximum_animation_contents_scale);
+  EXPECT_FLOAT_EQ(
+      0.f, child1_layer->draw_properties().maximum_animation_contents_scale);
+  EXPECT_FLOAT_EQ(
+      8.f, child2_layer->draw_properties().maximum_animation_contents_scale);
+
+  EXPECT_FLOAT_EQ(1.f, root_layer->draw_properties().page_scale_factor);

[danakj, 2014/05/23 17:07:34]

Can you set a page scale factor on the host_impl.active_tree(), and make the
child2_layer the "page scale layer" passed to CalculateDrawProperties. Then we
should see that in its page_scale_factor, and also in its ideal_content_scale
and animation scale.

And last also give a non-1 device scale factor to the CalculateDrawProperties
call, so we see that in all of the scale factors (except not baked into the
page_scale_factor).

+  EXPECT_FLOAT_EQ(1.f, child1_layer->draw_properties().page_scale_factor);
+  EXPECT_FLOAT_EQ(1.f, child2_layer->draw_properties().page_scale_factor);
+
+  EXPECT_FLOAT_EQ(1.f, root_layer->draw_properties().device_scale_factor);
+  EXPECT_FLOAT_EQ(1.f, child1_layer->draw_properties().device_scale_factor);
+  EXPECT_FLOAT_EQ(1.f, child2_layer->draw_properties().device_scale_factor);
+}
+
 }  // namespace
 }  // namespace cc