Remove WebScroll*

sky/engine/platform/BUILD.gn

 # Copyright 2014 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("//build/config/ui.gni")
 import("//sky/engine/build/scripts/scripts.gni")
 import("//sky/engine/config.gni")
 
 # Most targets in this file are private actions so use that as the default.
 visibility = [":*"]
@@ skipping 111 matching lines @@
     "exported/WebArrayBuffer.cpp",
     "exported/WebCommon.cpp",
     "exported/WebConvertableToTraceFormat.cpp",
     "exported/WebCString.cpp",
     "exported/WebCursorInfo.cpp",
     "exported/WebData.cpp",
     "exported/WebFilterKeyframe.cpp",
     "exported/WebHTTPBody.cpp",
     "exported/WebHTTPLoadInfo.cpp",
     "exported/WebImageSkia.cpp",
-    "exported/WebScrollbarImpl.cpp",
-    "exported/WebScrollbarImpl.h",
-    "exported/WebScrollbarThemeGeometryNative.cpp",
-    "exported/WebScrollbarThemeGeometryNative.h",
     "exported/WebString.cpp",
     "exported/WebTransformKeyframe.cpp",
     "exported/WebURL.cpp",
     "exported/WebURLError.cpp",
     "exported/WebURLLoadTiming.cpp",
     "exported/WebURLRequest.cpp",
     "exported/WebURLRequestPrivate.h",
     "exported/WebURLResponse.cpp",
     "exported/WebURLResponsePrivate.h",
     "exported/WrappedResourceRequest.h",
@@ skipping 365 matching lines @@
     "PlatformThreadData.cpp",
     "PlatformThreadData.h",
     "PlatformTouchEvent.h",
     "PlatformTouchPoint.h",
     "PlatformWheelEvent.h",
     "PurgeableVector.cpp",
     "PurgeableVector.h",
     "RefCountedSupplement.h",
     "ScriptForbiddenScope.cpp",
     "ScriptForbiddenScope.h",
-    "scroll/ProgrammaticScrollAnimator.cpp",
-    "scroll/ProgrammaticScrollAnimator.h",
     "scroll/ScrollableArea.cpp",
     "scroll/ScrollableArea.h",
     "scroll/ScrollAnimator.cpp",
     "scroll/ScrollAnimator.h",
     "scroll/Scrollbar.cpp",
     "scroll/Scrollbar.h",
     "scroll/ScrollTypes.h",
     "SharedBuffer.cpp",
     "SharedBuffer.h",
     "SharedBufferChunkReader.cpp",
@@ skipping 279 matching lines @@
     # See https://bugs.webkit.org/show_bug.cgi?id=62916.
     # TODO(GYP)
     #'cflags': ['-marm'],
     #    'conditions': [
     #      ['OS=="android"', {
     #        'cflags!': ['-mthumb'],
     #      }],
     #    ],
   }
 }