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

components/autofill/core/common/form_field_data.h

 // Copyright 2013 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.
 
 #ifndef COMPONENTS_AUTOFILL_CORE_COMMON_FORM_FIELD_DATA_H_
 #define COMPONENTS_AUTOFILL_CORE_COMMON_FORM_FIELD_DATA_H_
 
 #include <stddef.h>
 
 #include <vector>
@@ skipping 12 matching lines @@
 struct FormFieldData {
   // Copied to components/autofill/ios/browser/resources/autofill_controller.js.
   enum RoleAttribute {
     // "presentation"
     ROLE_ATTRIBUTE_PRESENTATION,
     // Anything else.
     ROLE_ATTRIBUTE_OTHER,
   };
 
   FormFieldData();
+  FormFieldData(const FormFieldData& other);
   ~FormFieldData();
 
   // Returns true if two form fields are the same, not counting the value.
   bool SameFieldAs(const FormFieldData& field) const;
 
   // Comparison operator exposed for STL map. Uses label, then name to sort.
   bool operator<(const FormFieldData& field) const;
 
   // If you add more, be sure to update the comparison operator, SameFieldAs,
   // serializing functions (in the .cc file) and the constructor.
@@ skipping 42 matching lines @@
     EXPECT_EQ(expected.autocomplete_attribute, actual.autocomplete_attribute); \
     EXPECT_EQ(expected.max_length, actual.max_length); \
     EXPECT_EQ(expected.is_autofilled, actual.is_autofilled); \
     EXPECT_EQ(expected.is_checked, actual.is_checked); \
     EXPECT_EQ(expected.is_checkable, actual.is_checkable); \
   } while (0)
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_COMMON_FORM_FIELD_DATA_H_