Remove Expression::bounds_, in order to conserve memory during parsing.

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/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
 if (is_android) {
@@ skipping 745 matching lines @@
     "src/assert-scope.cc",
     "src/assert-scope.h",
     "src/ast/ast-expression-rewriter.cc",
     "src/ast/ast-expression-rewriter.h",
     "src/ast/ast-expression-visitor.cc",
     "src/ast/ast-expression-visitor.h",
     "src/ast/ast-literal-reindexer.cc",
     "src/ast/ast-literal-reindexer.h",
     "src/ast/ast-numbering.cc",
     "src/ast/ast-numbering.h",
+    "src/ast/ast-type-bounds.h",
     "src/ast/ast-value-factory.cc",
     "src/ast/ast-value-factory.h",
     "src/ast/ast.cc",
     "src/ast/ast.h",
     "src/ast/modules.cc",
     "src/ast/modules.h",
     "src/ast/prettyprinter.cc",
     "src/ast/prettyprinter.h",
     "src/ast/scopeinfo.cc",
     "src/ast/scopeinfo.h",
@@ skipping 1420 matching lines @@
   ]
 
   deps = [
     ":fuzzer_support",
   ]
 
   configs = [
     ":internal_config",
   ]
 }