HUD: Show first paint invalidation in red

cc/blink/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.
 
 # GYP version: //cc/blink/cc_blink.gyp:cc_blink
 component("blink") {
   output_name = "cc_blink"
 
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
     "//cc",
     "//gpu",
     "//skia",
     "//third_party/WebKit/public:blink",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 
   defines = [ "CC_BLINK_IMPLEMENTATION" ]
 
   forward_dependent_configs_from = [ "//skia" ]
 
   sources = [
+    "blink_layer_debug_info.cc",
+    "blink_layer_debug_info.h",
     "cc_blink_export.h",
     "scrollbar_impl.cc",
     "scrollbar_impl.h",
     "web_animation_curve_common.cc",
     "web_animation_curve_common.h",
     "web_animation_impl.cc",
     "web_animation_impl.h",
     "web_compositor_support_impl.cc",
     "web_compositor_support_impl.h",
     "web_content_layer_impl.cc",
@@ skipping 42 matching lines @@
     "//cc",
     "//cc:test_support",
   ]
 
   sources = [
     "web_animation_unittest.cc",
     "web_float_animation_curve_unittest.cc",
     "web_layer_impl_fixed_bounds_unittest.cc",
   ]
 }