Implement Element.scrollIntoView for scroll-behavior: smooth.

third_party/WebKit/Source/core/core_idl_files.gni

 # Copyright 2016 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.
 
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 
 # The paths in this file are absolute since this file is imported and the
 # file lists must be valid from multple "current directories".
 
@@ skipping 540 matching lines @@
                     "events/PopStateEventInit.idl",
                     "events/ProgressEventInit.idl",
                     "events/PromiseRejectionEventInit.idl",
                     "events/SecurityPolicyViolationEventInit.idl",
                     "events/TouchEventInit.idl",
                     "events/TransitionEventInit.idl",
                     "events/UIEventInit.idl",
                     "events/WheelEventInit.idl",
                     "fileapi/BlobPropertyBag.idl",
                     "fileapi/FilePropertyBag.idl",
+                    "frame/ScrollIntoViewOptions.idl",
                     "frame/ScrollOptions.idl",
                     "frame/ScrollToOptions.idl",
                     "html/AssignedNodesOptions.idl",
                     "html/ImageDataColorSettings.idl",
                     "html/canvas/CanvasContextCreationAttributes.idl",
                     "html/track/TrackEventInit.idl",
                     "imagebitmap/ImageBitmapOptions.idl",
                     "input/InputDeviceCapabilitiesInit.idl",
                     "mojo/MojoCreateDataPipeOptions.idl",
                     "mojo/MojoCreateDataPipeResult.idl",
@@ skipping 81 matching lines @@
 core_generated_interface_idl_files = generated_webcore_testing_idl_files  # interfaces
 core_generated_dependency_idl_files =
     core_global_constructors_generated_idl_files  # partial interfaces
 
 # Dependency IDL files: don't generate individual bindings, but do process
 # in IDL dependency computation, and count as build dependencies
 # 'core_dependency_idl_files' is already used in Source/core, so avoid
 # collision
 core_all_dependency_idl_files =
     core_static_dependency_idl_files + core_generated_dependency_idl_files