[Autofill/Autocomplete Feature] Substring matching instead of prefix matching.

components/autofill/core/browser/suggestion.cc

Index: components/autofill/core/browser/suggestion.cc
diff --git a/components/autofill/core/browser/suggestion.cc b/components/autofill/core/browser/suggestion.cc
index d906207eb9cd47b104e346b5cb69ccdf83e246b2..caa47b27b5ae9134dc2ab23e5f59a07bfab3799c 100644
--- a/components/autofill/core/browser/suggestion.cc
+++ b/components/autofill/core/browser/suggestion.cc
@@ -29,7 +29,8 @@ bool SuggestionBackendID::operator<(const SuggestionBackendID& other) const {
 }
 
 Suggestion::Suggestion()
-    : frontend_id(0) {
+    : frontend_id(0),
+      match(PREFIX_MATCH) {
 }
 
 Suggestion::Suggestion(const Suggestion& other)
@@ -37,12 +38,14 @@ Suggestion::Suggestion(const Suggestion& other)
       frontend_id(other.frontend_id),
       value(other.value),
       label(other.label),
-      icon(other.icon) {
+      icon(other.icon),
+      match(other.match) {
 }
 
 Suggestion::Suggestion(const base::string16& v)
     : frontend_id(0),
-      value(v) {
+      value(v),
+      match(PREFIX_MATCH) {
 }
 
 Suggestion::Suggestion(const std::string& v,
@@ -52,7 +55,8 @@ Suggestion::Suggestion(const std::string& v,
     : frontend_id(fid),
       value(base::UTF8ToUTF16(v)),
       label(base::UTF8ToUTF16(l)),
-      icon(base::UTF8ToUTF16(i)) {
+      icon(base::UTF8ToUTF16(i)),
+      match(PREFIX_MATCH) {
 }
 
 Suggestion::~Suggestion() {