--method-blocklist should also cover free functions.

tools/clang/rewrite_to_chrome_style/tests/functions-expected.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 {
 
 namespace {
 
 // Naive renaming will break the build, by leaving return type the same name as
 // the function name - to avoid this "Get" prefix needs to be prepended as
@@ skipping 33 matching lines @@
 void swap(SwapType& a, SwapType& b) {}
 
 // Note: F is already Google style and should not change.
 void F() {
   // Test referencing a function without calling it.
   int (*function_pointer)(int, int) = &TestFunctionThatTakesTwoInts;
 }
 
 void Bug640688(int);  // Declaration within blink namespace.
 
+// Tests for --method-blocklist cmdline parameter.
+namespace IdlFunctions {
+void foo();
+}  // namespace IdlFunctions
+
 }  // namespace blink
 
 // Definition outside of blink namespace.
 void blink::Bug640688(int my_param) {
   char my_variable = 'c';
 }
 
 using blink::TestFunctionThatTakesTwoInts;
 
 void G() {
   TestFunctionThatTakesTwoInts(1, 2);
 
   blink::SwapType a, b;
   swap(a, b);
 }