rewrite_to_chrome_style: skip nodes in synthesized functions.

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

Index: tools/clang/rewrite_to_chrome_style/tests/fields-original.cc
diff --git a/tools/clang/rewrite_to_chrome_style/tests/fields-original.cc b/tools/clang/rewrite_to_chrome_style/tests/fields-original.cc
index 2710d237efcc4d2afd7dc1710e3a49cb22d64084..0f5cd7428088d8f6307c114d2099bebfe28b3246 100644
--- a/tools/clang/rewrite_to_chrome_style/tests/fields-original.cc
+++ b/tools/clang/rewrite_to_chrome_style/tests/fields-original.cc
@@ -50,4 +50,8 @@ union U {
 void F() {
   // Test that references to a static field are correctly rewritten.
   blink::C::instanceCount++;
+  // Force instantiation of a copy constructor for blink::C to make sure field

[dcheng, 2016/01/28 06:07:32]

I couldn't repro this with an explicitly defaulted copy ctor.

+  // initializers for synthesized functions don't cause weird rewrites.
+  blink::C c;
+  blink::C c2 = c;
 }