hasUnqualifiedDesugaredType now comes with clang - stop defining it outselves.

tools/clang/rewrite_to_chrome_style/RewriteToChromeStyle.cpp

 // Copyright 2015 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.
 //
 // Changes Blink-style names to Chrome-style names. Currently transforms:
 //   fields:
 //     int m_operationCount => int operation_count_
 //   variables (including parameters):
 //     int mySuperVariable => int my_super_variable
 //   constants:
@@ skipping 60 matching lines @@
         cxxDependentScopeMemberExpr;
 
 AST_MATCHER(clang::FunctionDecl, isOverloadedOperator) {
   return Node.isOverloadedOperator();
 }
 
 AST_MATCHER(clang::CXXMethodDecl, isInstanceMethod) {
   return Node.isInstance();
 }
 
-// TODO(lukasza): Remove this matcher definition, after we pull
-// https://reviews.llvm.org/D27207 (aka rL288366) from upstream clang.
-AST_MATCHER_P(clang::Type,
-              hasUnqualifiedDesugaredType,
-              clang::ast_matchers::internal::Matcher<clang::Type>,
-              InnerMatcher) {
-  const clang::Type* desugaredType = Node.getUnqualifiedDesugaredType();
-  return InnerMatcher.matches(*desugaredType, Finder, Builder);
-}
-
 AST_MATCHER_P(clang::FunctionTemplateDecl,
               templatedDecl,
               clang::ast_matchers::internal::Matcher<clang::FunctionDecl>,
               InnerMatcher) {
   return InnerMatcher.matches(*Node.getTemplatedDecl(), Finder, Builder);
 }
 
 // If |InnerMatcher| matches |top|, then the returned matcher will match:
 // - |top::function|
 // - |top::Class::method|
@@ skipping 1181 matching lines @@
   for (const auto& r : replacements) {
     std::string replacement_text = r.getReplacementText().str();
     std::replace(replacement_text.begin(), replacement_text.end(), '\n', '\0');
     llvm::outs() << "r:::" << r.getFilePath() << ":::" << r.getOffset()
                  << ":::" << r.getLength() << ":::" << replacement_text << "\n";
   }
   llvm::outs() << "==== END EDITS ====\n";
 
   return 0;
 }