Blacklist renaming inside blink::protocol namespace.

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 1024 matching lines @@
   clang::tooling::ClangTool tool(options.getCompilations(),
                                  options.getSourcePathList());
 
   MatchFinder match_finder;
   std::set<Replacement> replacements;
 
   // Blink namespace matchers ========
   auto blink_namespace_decl =
       namespaceDecl(anyOf(hasName("blink"), hasName("WTF")),
                     hasParent(translationUnitDecl()));
+  auto protocol_namespace_decl =
+      namespaceDecl(hasName("protocol"),
+                    hasParent(namespaceDecl(hasName("blink"),
+                                            hasParent(translationUnitDecl()))));
 
   // Given top-level compilation unit:
   //   namespace WTF {
   //     void foo() {}
   //   }
   // matches |foo|.
-  auto decl_under_blink_namespace = decl(hasAncestor(blink_namespace_decl));
+  auto decl_under_blink_namespace =
+      decl(hasAncestor(blink_namespace_decl),
+           unless(hasAncestor(protocol_namespace_decl)));
 
   // Given top-level compilation unit:
   //   void WTF::function() {}
   //   void WTF::Class::method() {}
   // matches |WTF::function| and |WTF::Class::method| decls.
   auto decl_has_qualifier_to_blink_namespace =
       declaratorDecl(has(nestedNameSpecifier(
           hasTopLevelPrefix(specifiesNamespace(blink_namespace_decl)))));
 
   auto in_blink_namespace = decl(
@@ skipping 347 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;
 }