Revert of Use LTHI's *_list() accessors whenever possible (patchset #1 id:1 of https://codereview.chromium.org/1748813003/ )

Reason for revert:
I'm going to try another, less code-churny, approach to the layer list conversion.

Original issue's description:
> Use LTHI's *_list() accessors whenever possible
>
> This is a mechanical patch which replaces instances of
>
>   LTHI->[active|pending|recycle|_tree()->list()
>
> with
>
>   LTHI->[active|pending|recycle|_list()
>
> BUG=557194
> CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
>
> Committed: https://crrev.com/c2a4176b6099eb93c2198778442e54ad1d1ac78e
> Cr-Commit-Position: refs/heads/master@{#378429}

TBR=tdresser@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=557194

Review URL: https://codereview.chromium.org/1759443002

Cr-Commit-Position: refs/heads/master@{#378603}

2 files changed, 7 insertions, 7 deletions

diff --git a/cc/input/scrollbar_animation_controller_linear_fade_unittest.cc b/cc/input/scrollbar_animation_controller_linear_fade_unittest.cc
index 2f9e3bb..20cf0b8 100644
--- a/cc/input/scrollbar_animation_controller_linear_fade_unittest.cc
+++ b/cc/input/scrollbar_animation_controller_linear_fade_unittest.cc
@@ -131,7 +131,7 @@ TEST_F(ScrollbarAnimationControllerLinearFadeTest,
 }
 
 TEST_F(ScrollbarAnimationControllerLinearFadeTest, HideOnResize) {
-  LayerImpl* scroll_layer = host_impl_.active_list()->LayerById(1);
+  LayerImpl* scroll_layer = host_impl_.active_tree()->list()->LayerById(1);
   ASSERT_TRUE(scroll_layer);
   EXPECT_EQ(gfx::Size(200, 200), scroll_layer->bounds());
 
@@ -162,7 +162,7 @@ TEST_F(ScrollbarAnimationControllerLinearFadeTest, HideOnResize) {
 }
 
 TEST_F(VerticalScrollbarAnimationControllerLinearFadeTest, HideOnResize) {
-  LayerImpl* scroll_layer = host_impl_.active_list()->LayerById(1);
+  LayerImpl* scroll_layer = host_impl_.active_tree()->list()->LayerById(1);
   ASSERT_TRUE(scroll_layer);
   EXPECT_EQ(gfx::Size(200, 200), scroll_layer->bounds());
 
@@ -195,7 +195,7 @@ TEST_F(ScrollbarAnimationControllerLinearFadeTest,
        HideOnUserNonScrollableHorz) {
   EXPECT_EQ(HORIZONTAL, scrollbar_layer_->orientation());
 
-  LayerImpl* scroll_layer = host_impl_.active_list()->LayerById(1);
+  LayerImpl* scroll_layer = host_impl_.active_tree()->list()->LayerById(1);
   ASSERT_TRUE(scroll_layer);
   scroll_layer->set_user_scrollable_horizontal(false);
 
@@ -211,7 +211,7 @@ TEST_F(ScrollbarAnimationControllerLinearFadeTest,
        ShowOnUserNonScrollableVert) {
   EXPECT_EQ(HORIZONTAL, scrollbar_layer_->orientation());
 
-  LayerImpl* scroll_layer = host_impl_.active_list()->LayerById(1);
+  LayerImpl* scroll_layer = host_impl_.active_tree()->list()->LayerById(1);
   ASSERT_TRUE(scroll_layer);
   scroll_layer->set_user_scrollable_vertical(false);
 
@@ -227,7 +227,7 @@ TEST_F(VerticalScrollbarAnimationControllerLinearFadeTest,
        HideOnUserNonScrollableVert) {
   EXPECT_EQ(VERTICAL, scrollbar_layer_->orientation());
 
-  LayerImpl* scroll_layer = host_impl_.active_list()->LayerById(1);
+  LayerImpl* scroll_layer = host_impl_.active_tree()->list()->LayerById(1);
   ASSERT_TRUE(scroll_layer);
   scroll_layer->set_user_scrollable_vertical(false);
 
@@ -243,7 +243,7 @@ TEST_F(VerticalScrollbarAnimationControllerLinearFadeTest,
        ShowOnUserNonScrollableHorz) {
   EXPECT_EQ(VERTICAL, scrollbar_layer_->orientation());
 
-  LayerImpl* scroll_layer = host_impl_.active_list()->LayerById(1);
+  LayerImpl* scroll_layer = host_impl_.active_tree()->list()->LayerById(1);
   ASSERT_TRUE(scroll_layer);
   scroll_layer->set_user_scrollable_horizontal(false);
 
diff --git a/cc/input/scrollbar_animation_controller_thinning_unittest.cc b/cc/input/scrollbar_animation_controller_thinning_unittest.cc
index 6ecb733..12b2d84 100644
--- a/cc/input/scrollbar_animation_controller_thinning_unittest.cc
+++ b/cc/input/scrollbar_animation_controller_thinning_unittest.cc
@@ -90,7 +90,7 @@ TEST_F(ScrollbarAnimationControllerThinningTest, Idle) {
 
 // Check that scrollbar disappears when the layer becomes non-scrollable.
 TEST_F(ScrollbarAnimationControllerThinningTest, HideOnResize) {
-  LayerImpl* scroll_layer = host_impl_.active_list()->LayerById(1);
+  LayerImpl* scroll_layer = host_impl_.active_tree()->list()->LayerById(1);
   ASSERT_TRUE(scroll_layer);
   EXPECT_EQ(gfx::Size(200, 200), scroll_layer->bounds());