Move counters for passwords, history and autofill to components

components/browsing_data/core/counters/browsing_data_counter.h

Index: components/browsing_data/core/counters/browsing_data_counter.h
diff --git a/components/browsing_data/core/counters/browsing_data_counter.h b/components/browsing_data/core/counters/browsing_data_counter.h
index 5ef123945db9a5feaff42b95aae91ab6e467dc6d..c2749364f539cabb9ae2e39b49f8650a696b11c9 100644
--- a/components/browsing_data/core/counters/browsing_data_counter.h
+++ b/components/browsing_data/core/counters/browsing_data_counter.h
@@ -58,14 +58,14 @@ class BrowsingDataCounter {
 
   typedef base::Callback<void(std::unique_ptr<Result>)> Callback;
 
-  BrowsingDataCounter(const std::string& pref_name);
+  BrowsingDataCounter();
   virtual ~BrowsingDataCounter();
 
   // Should be called once to initialize this class.
   void Init(PrefService* pref_service, const Callback& callback);
 
   // Name of the preference associated with this counter.
-  const std::string& GetPrefName() const;
+  virtual const char* GetPrefName() const = 0;
 
   // PrefService that manages the preferences for the user profile
   // associated with this counter.
@@ -95,9 +95,6 @@ class BrowsingDataCounter {
   // Count the data.
   virtual void Count() = 0;
 
-  // Name of the preference associated with this counter.
-  const std::string pref_name_;
-
   // Pointer to the PrefService that manages the preferences for the user
   // profile associated with this counter.
   PrefService* pref_service_;