[cc] Remove unused parameter to DidUpdateScrollOffset

cc/trees/layer_tree_host_unittest_scroll.cc

 // Copyright 2012 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/trees/layer_tree_host.h"
 
 #include "base/location.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 1411 matching lines @@
     parent->AddChild(scroll_layer);
     return scroll_layer.get();
   }
 
   static void SetScrollOffsetDelta(LayerImpl* layer_impl,
                                    const gfx::Vector2dF& delta) {
     if (layer_impl->layer_tree_impl()
             ->property_trees()
             ->scroll_tree.SetScrollOffsetDeltaForTesting(layer_impl->id(),
                                                          delta))
-      layer_impl->layer_tree_impl()->DidUpdateScrollOffset(
-          layer_impl->id(), layer_impl->transform_tree_index());
+      layer_impl->layer_tree_impl()->DidUpdateScrollOffset(layer_impl->id());
   }
 
   FakeLayerScrollClient root_scroll_layer_client_;
   FakeLayerScrollClient sibling_scroll_layer_client_;
   FakeLayerScrollClient child_scroll_layer_client_;
   int root_scroll_layer_id_;
   int sibling_scroll_layer_id_;
   int child_scroll_layer_id_;
 
   FakeContentLayerClient fake_content_layer_client_;
@@ skipping 529 matching lines @@
 
   const gfx::Vector2dF elastic_overscroll_test_cases_[5] = {
       gfx::Vector2dF(0, 0), gfx::Vector2dF(5, 10), gfx::Vector2dF(5, 5),
       gfx::Vector2dF(-4, -5), gfx::Vector2dF(0, 0)};
 };
 
 MULTI_THREAD_TEST_F(LayerTreeHostScrollTestElasticOverscroll);
 
 }  // namespace
 }  // namespace cc