Move ValidationMessageClientImpl to core/page/.

third_party/WebKit/Source/core/page/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("page") {
   sources = [
     "AutoscrollController.cpp",
     "AutoscrollController.h",
@@ skipping 46 matching lines @@
     "ScopedPageSuspender.cpp",
     "ScopedPageSuspender.h",
     "SpatialNavigation.cpp",
     "SpatialNavigation.h",
     "SpellCheckerClient.h",
     "TouchAdjustment.cpp",
     "TouchAdjustment.h",
     "TouchDisambiguation.cpp",
     "TouchDisambiguation.h",
     "ValidationMessageClient.h",
+    "ValidationMessageClientImpl.cpp",
+    "ValidationMessageClientImpl.h",
     "WindowFeatures.cpp",
     "WindowFeatures.h",
     "scrolling/OverscrollController.cpp",
     "scrolling/OverscrollController.h",
     "scrolling/RootScrollerController.cpp",
     "scrolling/RootScrollerController.h",
     "scrolling/RootScrollerUtil.cpp",
     "scrolling/RootScrollerUtil.h",
     "scrolling/ScrollCustomizationCallbacks.cpp",
     "scrolling/ScrollCustomizationCallbacks.h",
@@ skipping 11 matching lines @@
     "scrolling/TopDocumentRootScrollerController.h",
     "scrolling/ViewportScrollCallback.cpp",
     "scrolling/ViewportScrollCallback.h",
   ]
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 }