[Autofill] Update the autocomplete types implementation to match the current HTML spec.

chrome/common/form_field_data.h

Index: chrome/common/form_field_data.h
diff --git a/chrome/common/form_field_data.h b/chrome/common/form_field_data.h
index 286fb727293e41e575650e8d2a9cadadaccf331a..de9375f6d4152c2a421b8865f5fa3bcdbc88df00 100644
--- a/chrome/common/form_field_data.h
+++ b/chrome/common/form_field_data.h
@@ -26,8 +26,8 @@ struct FormFieldData {
   string16 label;
   string16 name;
   string16 value;
-  string16 form_control_type;
-  string16 autocomplete_type;
+  std::string form_control_type;
+  std::string autocomplete_attribute;
   size_t max_length;
   bool is_autofilled;
   bool is_focusable;
@@ -50,7 +50,7 @@ std::ostream& operator<<(std::ostream& os, const FormFieldData& field);
     EXPECT_EQ(expected.name, actual.name); \
     EXPECT_EQ(expected.value, actual.value); \
     EXPECT_EQ(expected.form_control_type, actual.form_control_type); \
-    EXPECT_EQ(expected.autocomplete_type, actual.autocomplete_type); \
+    EXPECT_EQ(expected.autocomplete_attribute, actual.autocomplete_attribute); \
     EXPECT_EQ(expected.max_length, actual.max_length); \
     EXPECT_EQ(expected.is_autofilled, actual.is_autofilled); \
   } while (0)