Update from https://crrev.com/312398

sky/engine/web/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/config.gni")
+import("//testing/test.gni")
 
 visibility = [ "//sky/*" ]
 
 platform_web_unittest_files = [
   "//sky/engine/platform/graphics/BitmapImageTest.cpp",
   "//sky/engine/platform/graphics/DeferredImageDecoderTest.cpp",
   "//sky/engine/platform/graphics/ImageDecodingStoreTest.cpp",
   "//sky/engine/platform/graphics/ImageFrameGeneratorTest.cpp",
   "//sky/engine/platform/graphics/OpaqueRectTrackingContentLayerDelegateTest.cpp",
   "//sky/engine/platform/graphics/test/MockImageDecoder.h",
@@ skipping 140 matching lines @@
   configs += [ "//sky/engine:config" ]
 
   if (!is_component_build) {
     deps += [ "//sky/engine/core" ]
 
     configs += [ "//sky/engine:inside_blink" ]
 
     sources += platform_web_unittest_files
   }
 }