[Autofill] Add metric for profile action on form submitted

components/autofill/core/browser/autofill_profile.cc

Index: components/autofill/core/browser/autofill_profile.cc
diff --git a/components/autofill/core/browser/autofill_profile.cc b/components/autofill/core/browser/autofill_profile.cc
index 06a3878689035c98781c432a71e356c2b53d272a..33ac00b341ac5d20377c2d2e6c2eff75ad352634 100644
--- a/components/autofill/core/browser/autofill_profile.cc
+++ b/components/autofill/core/browser/autofill_profile.cc
@@ -23,6 +23,7 @@
 #include "components/autofill/core/browser/address_i18n.h"
 #include "components/autofill/core/browser/autofill_country.h"
 #include "components/autofill/core/browser/autofill_field.h"
+#include "components/autofill/core/browser/autofill_metrics.h"
 #include "components/autofill/core/browser/autofill_type.h"
 #include "components/autofill/core/browser/contact_info.h"
 #include "components/autofill/core/browser/phone_number.h"
@@ -509,7 +510,7 @@ void AutofillProfile::OverwriteName(const NameInfo& imported_name,
   name_ = imported_name;
 }
 
-void AutofillProfile::OverwriteWith(const AutofillProfile& profile,
+bool AutofillProfile::OverwriteWith(const AutofillProfile& profile,
                                     const std::string& app_locale) {
   // Verified profiles should never be overwritten with unverified data.
   DCHECK(!IsVerified() || profile.IsVerified());
@@ -545,6 +546,8 @@ void AutofillProfile::OverwriteWith(const AutofillProfile& profile,
     field_types.erase(ADDRESS_HOME_LINE2);
   }
 
+  bool did_overwrite = false;
+
   for (ServerFieldTypeSet::const_iterator iter = field_types.begin();
        iter != field_types.end(); ++iter) {
     FieldTypeGroup group = AutofillType(*iter).group();
@@ -555,9 +558,13 @@ void AutofillProfile::OverwriteWith(const AutofillProfile& profile,
     }
 
     base::string16 new_value = profile.GetRawInfo(*iter);
-    if (!compare.StringsEqual(GetRawInfo(*iter), new_value))
+    if (!compare.StringsEqual(GetRawInfo(*iter), new_value)) {
       SetRawInfo(*iter, new_value);
+      did_overwrite = true;
+    }
   }
+
+  return did_overwrite;
 }
 
 bool AutofillProfile::SaveAdditionalInfo(const AutofillProfile& profile,
@@ -613,8 +620,15 @@ bool AutofillProfile::SaveAdditionalInfo(const AutofillProfile& profile,
     }
   }
 
-  if (!IsVerified() || profile.IsVerified())
-    OverwriteWith(profile, app_locale);
+  if (!IsVerified() || profile.IsVerified()) {
+    if (OverwriteWith(profile, app_locale)) {
+      AutofillMetrics::LogProfileActionOnFormSubmitted(
+          AutofillMetrics::EXISTING_PROFILE_UPDATED);
+    } else {
+      AutofillMetrics::LogProfileActionOnFormSubmitted(
+          AutofillMetrics::EXISTING_PROFILE_USED);
+    }
+  }
   return true;
 }