CC Animation: Erase cc::LayerSettings everywhere.

cc/test/layer_test_common.cc

Index: cc/test/layer_test_common.cc
diff --git a/cc/test/layer_test_common.cc b/cc/test/layer_test_common.cc
index f1326a517859de66e58c163f2740bf31071e9adb..2979d5e46f31e8c02b7d75284703603179cdb77f 100644
--- a/cc/test/layer_test_common.cc
+++ b/cc/test/layer_test_common.cc
@@ -18,7 +18,6 @@
 #include "cc/quads/render_pass.h"
 #include "cc/test/animation_test_common.h"
 #include "cc/test/fake_output_surface.h"
-#include "cc/test/layer_tree_settings_for_testing.h"
 #include "cc/test/mock_occlusion_tracker.h"
 #include "cc/trees/layer_tree_host_common.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -118,7 +117,7 @@ void LayerTestCommon::VerifyQuadsAreOccluded(const QuadList& quads,
 }
 
 LayerTestCommon::LayerImplTest::LayerImplTest()
-    : LayerImplTest(LayerTreeSettingsForTesting()) {}
+    : LayerImplTest(LayerTreeSettings()) {}
 
 LayerTestCommon::LayerImplTest::LayerImplTest(const LayerTreeSettings& settings)
     : client_(FakeLayerTreeHostClient::DIRECT_3D),
@@ -131,23 +130,19 @@ LayerTestCommon::LayerImplTest::LayerImplTest(const LayerTreeSettings& settings)
   host_->host_impl()->SetVisible(true);
   host_->host_impl()->InitializeRenderer(output_surface_.get());
 
-  if (host_->settings().use_compositor_animation_timelines) {
-    const int timeline_id = AnimationIdProvider::NextTimelineId();
-    timeline_ = AnimationTimeline::Create(timeline_id);
-    host_->animation_host()->AddAnimationTimeline(timeline_);
-    // Create impl-side instance.
-    host_->animation_host()->PushPropertiesTo(
-        host_->host_impl()->animation_host());
-    timeline_impl_ =
-        host_->host_impl()->animation_host()->GetTimelineById(timeline_id);
-  }
+  const int timeline_id = AnimationIdProvider::NextTimelineId();
+  timeline_ = AnimationTimeline::Create(timeline_id);
+  host_->animation_host()->AddAnimationTimeline(timeline_);
+  // Create impl-side instance.
+  host_->animation_host()->PushPropertiesTo(
+      host_->host_impl()->animation_host());
+  timeline_impl_ =
+      host_->host_impl()->animation_host()->GetTimelineById(timeline_id);
 }
 
 LayerTestCommon::LayerImplTest::~LayerImplTest() {
-  if (host_->settings().use_compositor_animation_timelines) {
-    host_->animation_host()->RemoveAnimationTimeline(timeline_);
-    timeline_ = nullptr;
-  }
+  host_->animation_host()->RemoveAnimationTimeline(timeline_);
+  timeline_ = nullptr;
 }
 
 void LayerTestCommon::LayerImplTest::CalcDrawProps(