Remove GYP annotations from third_party GN files.

third_party/WebKit/Source/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("//testing/test.gni")
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/config.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 import("//third_party/WebKit/Source/modules/modules.gni")
@@ skipping 260 matching lines @@
       "Foundation.framework",
     ]
   }
 
   if (remove_webcore_debug_symbols) {
     configs -= [ "//build/config/compiler:default_symbols" ]
     configs += [ "//build/config/compiler:no_symbols" ]
   }
 }
 
-# GYP version: WebKit/Source/web/web.gyp:blink_web_test_support
 static_library("test_support") {
   deps = [
     "//skia",
     "//third_party/WebKit/Source/core:testing",
     "//third_party/WebKit/Source/modules:modules_testing",
     "//third_party/WebKit/Source/wtf",
     "//v8",
   ]
 
   sources = [
     "WebTestingSupport.cpp",
   ]
 
   configs += [ "//third_party/WebKit/Source:config" ]
 
   include_dirs = [ "$root_gen_dir/blink" ]
 }
 
 group("webkit_unit_tests_data") {
   data = [
     "tests/data/",
     "../core/paint/test_data/",
   ]
 }
 
-# GYP version: WebKit/Source/web/web_tests.gyp:webkit_unit_tests
 test("webkit_unit_tests") {
   visibility = []  # Allow re-assignment of list.
   visibility = [ "*" ]
 
   sources = [
     "AssociatedURLLoaderTest.cpp",
     "ExternalPopupMenuTest.cpp",
     "LinkHighlightImplTest.cpp",
     "PageOverlayTest.cpp",
     "WebDragDataTest.cpp",
@@ skipping 105 matching lines @@
 
   if (is_android) {
     deps += [
       "//base:base_java",
       "//content/public/android:content_java",
       "//content/shell/android:content_shell_assets",
       "//net/android:net_java",
     ]
   }
 }