rewrite_to_chrome_style: exclude conversion functions from being renamed

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

Index: tools/clang/rewrite_to_chrome_style/tests/methods-original.cc
diff --git a/tools/clang/rewrite_to_chrome_style/tests/methods-original.cc b/tools/clang/rewrite_to_chrome_style/tests/methods-original.cc
index cc764900833737b99dc014d4b57bb7e18f4aead3..8dc9b78932e6ae947f4a8e528b074fea5e71814e 100644
--- a/tools/clang/rewrite_to_chrome_style/tests/methods-original.cc
+++ b/tools/clang/rewrite_to_chrome_style/tests/methods-original.cc
@@ -16,7 +16,16 @@ class Task {
   // 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.