Change code to make jumbo exceptions unnecessary in core/html

third_party/WebKit/Source/core/html/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("//build/split_static_library.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 
 blink_core_sources("html") {
   split_count = 5
 
@@ skipping 601 matching lines @@
     "track/vtt/VTTParser.h",
     "track/vtt/VTTRegion.cpp",
     "track/vtt/VTTRegion.h",
     "track/vtt/VTTScanner.cpp",
     "track/vtt/VTTScanner.h",
     "track/vtt/VTTToken.h",
     "track/vtt/VTTTokenizer.cpp",
     "track/vtt/VTTTokenizer.h",
   ]
 
-  jumbo_excluded_sources = [
-    "canvas/CanvasRenderingContext.cpp",  # https://crbug.com/716395
-
-    # Does ugly things with undef (patch incoming)
-    "parser/HTMLTokenizer.cpp",
-
-    # kSupportedTokens in both HTMLMediaElementControlsList.cpp
-    # and HTMLIFrameElementSandbox.cpp
-    "HTMLIFrameElementSandbox.cpp",
-  ]
+  jumbo_excluded_sources = [ "canvas/CanvasRenderingContext.cpp" ]  # https://crbug.com/716395
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 }