Move debug_devtools to a buildflag_header.

chrome/browser/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 1235 matching lines @@
     "win/jumplist_updater.h",
     "win/settings_app_monitor.cc",
     "win/settings_app_monitor.h",
     "win/titlebar_config.cc",
     "win/titlebar_config.h",
   ]
 
   configs += [
     "//build/config/compiler:wexit_time_destructors",
     "//build/config:precompiled_headers",
-    "//third_party/WebKit/public:debug_devtools",
   ]
   defines = []
   libs = []
   ldflags = []
 
   allow_circular_includes_from = [ "//chrome/browser/ui" ]
 
   # iOS/non-iOS shared deps. New dependencies should generally be added in the
   # non-iOS deps below.
   public_deps = [
@@ skipping 167 matching lines @@
     "//mojo/edk/system",
     "//mojo/public/cpp/bindings",
     "//mojo/public/js",
     "//net:extras",
     "//net:net_with_v8",
     "//services/service_manager/public/cpp",
     "//skia",
     "//sql",
     "//storage/browser",
     "//storage/common",
+    "//third_party/WebKit/public:features",
     "//third_party/WebKit/public:image_resources",
     "//third_party/WebKit/public:resources",
     "//third_party/cacheinvalidation",
     "//third_party/icu",
     "//third_party/kasko",
     "//third_party/leveldatabase",
     "//third_party/libaddressinput",
     "//third_party/libjingle",
     "//third_party/libxml",
     "//third_party/libyuv",
@@ skipping 2910 matching lines @@
   # linking all of the test support.
   static_library("pepper_cdm_test_constants") {
     testonly = true
     visibility = [ "//chrome/*" ]
     sources = [
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }