rewrite_to_chrome_style: exclude conversion functions from being renamed

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 414 matching lines @@
   // override from a given base class. Instead, the rewriter uses two matchers:
   // one that matches all method declarations in the Blink namespace, and
   // another which matches all overridden methods not in the Blink namespace.
   // The second list is filtered against the first list to determine which
   // methods are inherited from Blink classes and need to be rewritten.
   auto blink_method_decl_matcher =
       id("decl", cxxMethodDecl(unless(anyOf(
                                    // Overloaded operators have special names
                                    // and should never be renamed.
                                    isOverloadedOperator(),
-                                   // Similarly, constructors and destructors
-                                   // should not be considered for renaming.
-                                   cxxConstructorDecl(), cxxDestructorDecl())),
+                                   // Similarly, constructors, destructors, and
+                                   // conversion functions should not be
+                                   // considered for renaming.
+                                   cxxConstructorDecl(), cxxDestructorDecl(),
+                                   cxxConversionDecl())),
                                in_blink_namespace));
   // Note that the matcher for overridden methods doesn't need to filter for
   // special member functions: see implementation of FunctionDeclRewriter for
   // the full explanation.
   auto non_blink_overridden_method_decl_matcher =
       id("decl", cxxMethodDecl(isOverride(), unless(in_blink_namespace)));
   MethodDeclRewriter method_decl_rewriter(&replacements);
   match_finder.addMatcher(blink_method_decl_matcher, &method_decl_rewriter);
   match_finder.addMatcher(non_blink_overridden_method_decl_matcher,
                           &method_decl_rewriter);
@@ skipping 70 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;
 }