Add header files that were missing from BUILD.gn.

skia/BUILD.gn

 # Copyright (c) 2013 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/features.gni")
 import("//build/config/ui.gni")
 import("//printing/features/features.gni")
 import("//testing/test.gni")
 import("//third_party/skia/gn/shared_sources.gni")
 
@@ skipping 204 matching lines @@
     "ext/opacity_filter_canvas.cc",
     "ext/platform_device.cc",
     "ext/platform_device_linux.cc",
     "ext/platform_device_mac.cc",
     "ext/platform_device_win.cc",
     "ext/recursive_gaussian_convolution.cc",
     "ext/skia_histogram.cc",
     "ext/skia_memory_dump_provider.cc",
     "ext/skia_trace_memory_dump_impl.cc",
     "ext/skia_utils_base.cc",
+    "ext/skia_utils_ios.h",
     "ext/skia_utils_ios.mm",
     "ext/skia_utils_mac.mm",
     "ext/skia_utils_win.cc",
   ]
 
   if (!is_ios) {
     sources += [ "ext/platform_canvas.cc" ]
   }
   if (!is_ios && (current_cpu == "x86" || current_cpu == "x64")) {
     sources += [ "ext/convolver_SSE2.cc" ]
@@ skipping 490 matching lines @@
 
     deps = [
       ":skia",
       "//base",
       "//base/test:test_support",
       "//build/config/sanitizers:deps",
       "//build/win:default_exe_manifest",
     ]
   }
 }