Replace layer id with Element id for tracking scrollbar animation controllers

cc/input/scrollbar_animation_controller_unittest.cc

 // Copyright 2013 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/input/scrollbar_animation_controller.h"
 
 #include "cc/layers/solid_color_scrollbar_layer_impl.h"
 #include "cc/test/fake_impl_task_runner_provider.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/geometry_test_utils.h"
@@ skipping 87 matching lines @@
             host_impl_.active_tree(), 4, VERTICAL, kThumbThickness, kTrackStart,
             kIsLeftSideVerticalScrollbar, kIsOverlayScrollbar);
     v_scrollbar_layer_ = v_scrollbar.get();
     h_scrollbar_layer_ = h_scrollbar.get();
 
     scroll_layer->test_properties()->AddChild(std::move(v_scrollbar));
     scroll_layer->test_properties()->AddChild(std::move(h_scrollbar));
     clip_layer_->test_properties()->AddChild(std::move(scroll_layer));
     host_impl_.active_tree()->SetRootLayerForTesting(std::move(clip));
 
-    v_scrollbar_layer_->SetScrollLayerId(scroll_layer_ptr->id());
-    h_scrollbar_layer_->SetScrollLayerId(scroll_layer_ptr->id());
+    v_scrollbar_layer_->SetScrollInfo(scroll_layer_ptr->id(),
+                                      scroll_layer_ptr->element_id());
+    h_scrollbar_layer_->SetScrollInfo(scroll_layer_ptr->id(),
+                                      scroll_layer_ptr->element_id());
     v_scrollbar_layer_->test_properties()->opacity_can_animate = true;
     h_scrollbar_layer_->test_properties()->opacity_can_animate = true;
     clip_layer_->SetBounds(gfx::Size(100, 100));
     scroll_layer_ptr->SetBounds(gfx::Size(200, 200));
     host_impl_.active_tree()->BuildLayerListAndPropertyTreesForTesting();
 
     scrollbar_controller_ = ScrollbarAnimationController::
         CreateScrollbarAnimationControllerAuraOverlay(
             scroll_layer_ptr->id(), &client_, kShowDelay, kFadeOutDelay,
             kResizeFadeOutDelay, kFadeOutDuration, kThinningDuration);
@@ skipping 1032 matching lines @@
     scrollbar_layer_->test_properties()->opacity_can_animate = true;
     std::unique_ptr<LayerImpl> clip =
         LayerImpl::Create(host_impl_.active_tree(), 3);
     clip_layer_ = clip.get();
     scroll_layer->SetScrollClipLayer(clip_layer_->id());
     LayerImpl* scroll_layer_ptr = scroll_layer.get();
     scroll_layer->test_properties()->AddChild(std::move(scrollbar));
     clip->test_properties()->AddChild(std::move(scroll_layer));
     host_impl_.active_tree()->SetRootLayerForTesting(std::move(clip));
 
-    scrollbar_layer_->SetScrollLayerId(scroll_layer_ptr->id());
+    scrollbar_layer_->SetScrollInfo(scroll_layer_ptr->id(),
+                                    scroll_layer_ptr->element_id());
     clip_layer_->SetBounds(gfx::Size(100, 100));
     scroll_layer_ptr->SetBounds(gfx::Size(200, 200));
     host_impl_.active_tree()->BuildLayerListAndPropertyTreesForTesting();
 
     scrollbar_controller_ =
         ScrollbarAnimationController::CreateScrollbarAnimationControllerAndroid(
             scroll_layer_ptr->id(), this, base::TimeDelta::FromSeconds(2),
             base::TimeDelta::FromSeconds(5), base::TimeDelta::FromSeconds(3));
   }
 
@@ skipping 421 matching lines @@
   EXPECT_FLOAT_EQ(1, scrollbar_layer_->Opacity());
 
   time += base::TimeDelta::FromSeconds(1);
   scrollbar_controller_->DidScrollEnd();
   EXPECT_FALSE(did_request_animate_);
   EXPECT_FLOAT_EQ(1, scrollbar_layer_->Opacity());
 }
 
 }  // namespace
 }  // namespace cc