rewrite_to_chrome_style: exclude conversion functions from being renamed

tools/clang/rewrite_to_chrome_style/tests/methods-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 {
 
 class Task {
  public:
   // Already style-compliant methods shouldn't change.
   void OutputDebugString() {}
 
   // Tests that the declarations for methods are updated.
   void doTheWork();
   virtual void reallyDoTheWork() = 0;
 
   // Note: this is purposely copyable and assignable, to make sure the Clang
   // tool doesn't try to emit replacements for things that aren't explicitly
   // written.
-  // TODO(dcheng): Add an explicit test for something like operator+.
+
+  // Overloaded operators should not be rewritten.
+  Task& operator++() {
+    return *this;
+  }
+
+  // Conversion functions should not be rewritten.
+  explicit operator int() const {
+    return 42;
+  }
 };
 
 // Test that the actual method definition is also updated.
 void Task::doTheWork() {
   reallyDoTheWork();
 }
 
 }  // namespace blink
 
 namespace Moo {
@@ skipping 12 matching lines @@
 
 // Finally, test that method pointers are also updated.
 void F() {
   void (blink::Task::*p1)() = &blink::Task::doTheWork;
   void (blink::Task::*p2)() = &BovineTask::doTheWork;
   void (blink::Task::*p3)() = &blink::Task::reallyDoTheWork;
   void (BovineTask::*p4)() = &BovineTask::reallyDoTheWork;
 }
 
 }  // namespace Moo