Media Controls: Fix time updates when dragging from track not scrubber

third_party/WebKit/Source/core/layout/BUILD.gn

 # 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/core/core.gni")
 
 blink_core_sources("layout") {
   split_count = 5
 
   sources = [
@@ skipping 204 matching lines @@
     "api/LayoutBoxItem.h",
     "api/LayoutBoxModel.h",
     "api/LayoutEmbeddedItem.h",
     "api/LayoutFullScreenItem.h",
     "api/LayoutImageItem.h",
     "api/LayoutItem.h",
     "api/LayoutLIItem.h",
     "api/LayoutMenuListItem.h",
     "api/LayoutPartItem.h",
     "api/LayoutProgressItem.h",
-    "api/LayoutSliderItem.h",
     "api/LayoutTextControlItem.h",
     "api/LayoutTextFragmentItem.h",
     "api/LayoutTextItem.h",
     "api/LayoutViewItem.h",
     "api/LineLayoutAPIShim.h",
     "api/LineLayoutBR.h",
     "api/LineLayoutBlockFlow.h",
     "api/LineLayoutBox.h",
     "api/LineLayoutBoxModel.h",
     "api/LineLayoutInline.h",
@@ skipping 139 matching lines @@
       "LayoutThemeAndroid.cpp",
       "LayoutThemeAndroid.h",
     ]
   }
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 }