Move parser-related files in core/css to core/css/parser

Source/core/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("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/bindings/core/v8/generated.gni")
 import("//third_party/WebKit/Source/bindings/modules/modules.gni")
 import("//third_party/WebKit/Source/bindings/modules/v8/generated.gni")
 import("//third_party/WebKit/Source/bindings/scripts/scripts.gni")
@@ skipping 889 matching lines @@
   outputs = [
     "$blink_core_output_dir/XMLNames.cpp",
     "$blink_core_output_dir/XMLNames.h",
   ]
 }
 
 # make_token_matcher -----------------------------------------------------------
 
 # "MakeTokenMatcher" in make_core_generated from GYP.
 make_token_matcher("make_core_generated_make_token_matcher") {
-  input_file = "css/CSSTokenizer-in.cpp"
+  input_file = "css/parser/CSSTokenizer-in.cpp"
   output_file = "$blink_core_output_dir/CSSTokenizer.cpp"
 }
 
 # "MakeParser" in make_core_generated from GYP.
 make_token_matcher("make_core_generated_make_parser") {
   input_file = "css/parser/BisonCSSParser-in.cpp"
   output_file = "$blink_core_output_dir/BisonCSSParser.cpp"
 }
 
 # "MakeTokenMatcherForViewport" in make_core_generated from GYP.
@@ skipping 140 matching lines @@
     "--output_dir", rel_blink_core_gen_dir,
   ]
 
   deps = make_core_generated_deps
 }
 
 # The bison rules from make_core_generated.
 action_foreach("make_core_generated_bison") {
   script = "../build/scripts/rule_bison.py"
   sources = [
-    "css/CSSGrammar.y",
+    "css/parser/CSSGrammar.y",
     "xml/XPathGrammar.y",
   ]
   outputs = [
     "$blink_core_output_dir/{{source_name_part}}.cpp",
     "$blink_core_output_dir/{{source_name_part}}.h",
   ]
   args = [
     "{{source}}",
     rel_blink_core_gen_dir,
     bison_exe,
   ]
 
   deps = make_core_generated_deps
 }