[Autofill] Sort profiles and credit cards by frecency in PaymentRequest.

chrome/browser/autofill/android/personal_data_manager_android.h

Index: chrome/browser/autofill/android/personal_data_manager_android.h
diff --git a/chrome/browser/autofill/android/personal_data_manager_android.h b/chrome/browser/autofill/android/personal_data_manager_android.h
index 2d1208822ed6cb72982a480846b4c08b91441888..d98620242515371a41506ff1fe075d9a985cf1b8 100644
--- a/chrome/browser/autofill/android/personal_data_manager_android.h
+++ b/chrome/browser/autofill/android/personal_data_manager_android.h
@@ -23,16 +23,11 @@ class PersonalDataManagerAndroid : public PersonalDataManagerObserver {
   // These functions act on "web profiles" aka "LOCAL_PROFILE" profiles.
   // -------------------------
 
-  // Returns the number of web and auxiliary profiles.
-  jint GetProfileCount(JNIEnv* unused_env,
-                       const base::android::JavaParamRef<jobject>& unused_obj);
-
-  // Returns the profile as indexed by |index| in the PersonalDataManager's
-  // |GetProfiles()| collection.
-  base::android::ScopedJavaLocalRef<jobject> GetProfileByIndex(
+  // Returns the GUIDs of the profiles to suggest to the user. See
+  // PersonalDataManager::GetProfilesToSuggest for more details.
+  base::android::ScopedJavaLocalRef<jobjectArray> GetProfileGUIDsToSuggest(
       JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& unused_obj,
-      jint index);
+      const base::android::JavaParamRef<jobject>& unused_obj);
 
   // Returns the profile with the specified |jguid|, or NULL if there is no
   // profile with the specified |jguid|. Both web and auxiliary profiles may
@@ -65,17 +60,11 @@ class PersonalDataManagerAndroid : public PersonalDataManagerObserver {
   // These functions act on local credit cards.
   // --------------------
 
-  // Returns the number of credit cards.
-  jint GetCreditCardCount(
-      JNIEnv* unused_env,
-      const base::android::JavaParamRef<jobject>& unused_obj);
-
-  // Returns the credit card as indexed by |index| in the PersonalDataManager's
-  // |GetCreditCards()| collection.
-  base::android::ScopedJavaLocalRef<jobject> GetCreditCardByIndex(
+  // Returns the GUIDs of the credit cards to suggest to the user. See
+  // PersonalDataManager::GetCreditCardsToSuggest for more details.
+  base::android::ScopedJavaLocalRef<jobjectArray> GetCreditCardGUIDsToSuggest(
       JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& unused_obj,
-      jint index);
+      const base::android::JavaParamRef<jobject>& unused_ob);
 
   // Returns the credit card with the specified |jguid|, or NULL if there is
   // no credit card with the specified |jguid|.
@@ -117,6 +106,23 @@ class PersonalDataManagerAndroid : public PersonalDataManagerObserver {
   // Registers the JNI bindings for this class.
   static bool Register(JNIEnv* env);
 
+  // Sets the use count and use date of the profile associated to the |jguid|.

[please use gerrit instead, 2016/05/24 20:21:48]

Ditto about |count| and |date| range assumptions and |date| format. 

[sebsg, 2016/05/24 21:41:22]

Done.

+  void SetProfileUseStatsForTest(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& unused_obj,
+      const base::android::JavaParamRef<jstring>& jguid,
+      jint count,
+      jint date);
+
+  // Sets the use count and use date of the credit card associated to the
+  // |jguid|.
+  void SetCreditCardUseStatsForTest(

[please use gerrit instead, 2016/05/24 20:21:48]

Ditto.

[sebsg, 2016/05/24 21:41:22]

Done.

+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& unused_obj,
+      const base::android::JavaParamRef<jstring>& jguid,
+      jint count,
+      jint date);
+
  private:
   ~PersonalDataManagerAndroid() override;