ParamVarDecl should never be renamed to kConstantStyle.

tools/clang/rewrite_to_chrome_style/tests/constants-original.cc

 // 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.
 
 namespace blink {
 
 // Simple global constants.
 const char helloWorldConstant[] = "Hello world!";
 // Make sure a one-character constant doesn't get mangled.
 const float e = 2.718281828;
@@ skipping 24 matching lines @@
         kFunctionConstant + kFunctionConstantFromExpression;
     // These don't do the right thing right now, but names like this don't
     // exist in blink (hopefully).
     const int should_be_renamed_to_a_const = 9 - 2;
     const int should_also_be_renamed_to_a_const =
         kFunctionConstant + kFunctionConstantFromOtherConsts;
     const int not_compile_time_const = kFunctionConstant + Function();
   }
 };
 
-void F() {
+// |constParam| should not be renamed to |kConstParam|.
+void F(const bool constParam = true) {
   // Constant in function body.
   static const char staticString[] = "abc";
   // Constant-style naming, since it's initialized with a literal.
   const char* const nonStaticStringConstant = "def";
   // Not constant-style naming, since it's not initialized with a literal.
   const char* const nonStaticStringUnconstant = nonStaticStringConstant;
 }
 
 }  // namespace blink