rewrite_to_chrome_style: skip nodes in synthesized functions.

tools/clang/rewrite_to_chrome_style/tests/fields-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 {
 
+// Note: do not add any copy or move constructors to this class: doing so will
+// break test coverage that we don't clobber the class name by trying to emit
+// replacements for synthesized functions.
 class C {
  public:
   // Make sure initializers are updated to use the new names.
   C() : flag_field_(~0), field_mentioning_http_and_https_(1) {}
 
   int Method() {
     // Test that references to fields are updated correctly.
     return instance_count_ + flag_field_ + field_mentioning_http_and_https_;
   }
 
@@ skipping 26 matching lines @@
   char fourChars[4];
   short twoShorts[2];
   int one_hopefully_four_byte_int;
 };
 
 }  // namespace blink
 
 void F() {
   // Test that references to a static field are correctly rewritten.
   blink::C::instance_count_++;
+  // Force instantiation of a copy constructor for blink::C to make sure field
+  // initializers for synthesized functions don't cause weird rewrites.
+  blink::C c;
+  blink::C c2 = c;
 }