content: Add out-of-line copy ctors for complex classes.

content/common/android/address_parser_internal.cc

Index: content/common/android/address_parser_internal.cc
diff --git a/content/common/android/address_parser_internal.cc b/content/common/android/address_parser_internal.cc
index 4f114a3f106900133f9600949b19cfa5a58d1cf2..9892bd853fb393c2aa9ef8d1e201555e1c9ccff3 100644
--- a/content/common/android/address_parser_internal.cc
+++ b/content/common/android/address_parser_internal.cc
@@ -77,6 +77,8 @@ Word::Word(const base::string16::const_iterator& begin,
   DCHECK(begin <= end);
 }
 
+Word::Word(const Word& other) = default;
+
 HouseNumberParser::HouseNumberParser() {
 }