Support autocompletion for HTMl5 tags:"email", "month" and "tel".

chrome/browser/autofill/autofill_manager.cc

Index: chrome/browser/autofill/autofill_manager.cc
diff --git a/chrome/browser/autofill/autofill_manager.cc b/chrome/browser/autofill/autofill_manager.cc
index 162375268776d8418d802d495793a96847dc7b5f..6794cda2eda0a04246544a8b0fa02a00abb7ce28 100644
--- a/chrome/browser/autofill/autofill_manager.cc
+++ b/chrome/browser/autofill/autofill_manager.cc
@@ -686,10 +686,23 @@ void AutoFillManager::FillCreditCardFormField(const CreditCard* credit_card,
   DCHECK(type.group() == AutoFillType::CREDIT_CARD);
   DCHECK(field);
 
-  if (field->form_control_type() == ASCIIToUTF16("select-one"))
+  if (field->form_control_type() == ASCIIToUTF16("select-one")) {
     autofill::FillSelectControl(credit_card, type, field);
-  else
+  } else if (field->form_control_type() == ASCIIToUTF16("month")) {
+    // HTML5 input="month" consists of year-month.
+    string16 year = credit_card->GetFieldText(
+        AutoFillType(CREDIT_CARD_EXP_4_DIGIT_YEAR));
+    string16 month = credit_card->GetFieldText(
+        AutoFillType(CREDIT_CARD_EXP_MONTH));
+    if (!year.empty() && !month.empty()) {
+      // Iff |credit_card| has both year and month, fill the value.
+      // Because |credit_card| might not have both info.
+      month = year + ASCIIToUTF16("-") + month;
+      field->set_value(month);
+    }
+  } else {
     field->set_value(credit_card->GetFieldText(type));
+  }
 }
 
 void AutoFillManager::FillFormField(const AutoFillProfile* profile,