using ulp to improve TranslateManager GetTargetLanguage() and InitiateTranslation()

components/translate/core/browser/translate_prefs.h

Index: components/translate/core/browser/translate_prefs.h
diff --git a/components/translate/core/browser/translate_prefs.h b/components/translate/core/browser/translate_prefs.h
index d03e2590061debcd9317873d50af269330d1de37..9ecce6c71c2771f358da9b4c5a6fe33b2987ddfc 100644
--- a/components/translate/core/browser/translate_prefs.h
+++ b/components/translate/core/browser/translate_prefs.h
@@ -78,6 +78,7 @@ class DenialTimeUpdate {
 // It is assumed that |prefs_| is alive while this instance is alive.
 class TranslatePrefs {
  public:
+  static const char kPrefLanguageProfile[];
   static const char kPrefTranslateSiteBlacklist[];
   static const char kPrefTranslateWhitelists[];
   static const char kPrefTranslateDeniedCount[];
@@ -165,6 +166,16 @@ class TranslatePrefs {
   bool ShouldAutoTranslate(const std::string& original_language,
                            std::string* target_language);
 
+  // Language and probability pair.
+  typedef std::pair<std::string, double> LanguageAndProbability;
+  typedef std::vector<LanguageAndProbability> LanguageAndProbabilityList;
+
+  // Output the User Profile Profile's (ULP) "reading list" into |list| as
+  // ordered list of <string, double> pair. Return the confidence of the list

[groby-ooo-7-16, 2016/08/04 02:33:43]

What is the list ordered by? I assume the double?

[ftang, 2016/08/05 04:45:28]

Done.

+  // or 0.0 if there no ULP "reading list".
+  virtual double GetReadingFromUserLanguageProfile(

[groby-ooo-7-16, 2016/08/04 02:33:42]

Please don't make this virtual (relates to the "no mock" comment)

[ftang, 2016/08/05 04:45:28]

Done.

+      LanguageAndProbabilityList* list) const;
+
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
   static void MigrateUserPrefs(PrefService* user_prefs,
                                const char* accept_languages_pref);