Refactor BrowsingDataRemover creation for clarity.

chrome/browser/browsing_data/browsing_data_remover.h

Index: chrome/browser/browsing_data/browsing_data_remover.h
diff --git a/chrome/browser/browsing_data/browsing_data_remover.h b/chrome/browser/browsing_data/browsing_data_remover.h
index 5a1e9f879cdc69e42903523f76d99839a1808261..2e966606b588232a00af3758311c769d5520c37d 100644
--- a/chrome/browser/browsing_data/browsing_data_remover.h
+++ b/chrome/browser/browsing_data/browsing_data_remover.h
@@ -116,15 +116,30 @@ class BrowsingDataRemover : public content::NotificationObserver,
     virtual ~Observer() {}
   };
 
-  // Creates a BrowsingDataRemover to remove browser data from the specified
-  // profile in the specified time range. Use Remove to initiate the removal.
-  BrowsingDataRemover(Profile* profile, base::Time delete_begin,
-                      base::Time delete_end);
+  // Creates a BrowsingDataRemover object that removes data regardless of the
+  // time it was last modified. Returns a raw pointer, as BrowsingDataRemover
+  // retains ownership of itself, and deletes itself once finished.
+  static BrowsingDataRemover* CreateForUnboundedRange(Profile* profile);
+
+  // Creates a BrowsingDataRemover object bound on both sides by a time. Returns
+  // a raw pointer, as BrowsingDataRemover retains ownership of itself, and
+  // deletes itself once finished.
+  static BrowsingDataRemover* CreateForRange(Profile* profile,
+                                             base::Time delete_begin,
+                                             base::Time delete_end);
+
+  // Creates a BrowsingDataRemover bound to a specific period of time (as
+  // defined via a TimePeriod). Returns a raw pointer, as BrowsingDataRemover
+  // retains ownership of itself, and deletes itself once finished.
+  static BrowsingDataRemover* CreateForPeriod(Profile* profile,
+                                              TimePeriod period);
 
-  // Creates a BrowsingDataRemover to remove browser data from the specified
-  // profile in the specified time range.
-  BrowsingDataRemover(Profile* profile, TimePeriod time_period,
-                      base::Time delete_end);
+  // Quota managed data uses a different bitmask for types than
+  // BrowsingDataRemover uses. This method generates that mask.
+  static int GenerateQuotaClientMask(int remove_mask);
+
+  // Is the BrowsingDataRemover currently in the process of removing data?
+  static bool is_removing() { return is_removing_; }
 
   // Removes the specified items related to browsing for all origins that match
   // the provided |origin_set_mask| (see BrowsingDataHelper::OriginSetMask).
@@ -136,15 +151,9 @@ class BrowsingDataRemover : public content::NotificationObserver,
   // Called when history deletion is done.
   void OnHistoryDeletionDone();
 
-  // Quota managed data uses a different bitmask for types than
-  // BrowsingDataRemover uses. This method generates that mask.
-  static int GenerateQuotaClientMask(int remove_mask);
-
   // Used for testing.
   void OverrideQuotaManagerForTesting(quota::QuotaManager* quota_manager);
 
-  static bool is_removing() { return removing_; }
-
  private:
   // The clear API needs to be able to toggle removing_ in order to test that
   // only one BrowsingDataRemover instance can be called at a time.
@@ -167,6 +176,19 @@ class BrowsingDataRemover : public content::NotificationObserver,
     STATE_DONE
   };
 
+  // Calculate the begin time for the deletion range specified by |time_period|.
+  static base::Time CalculateBeginDeleteTime(TimePeriod time_period);
+
+  // Setter for |is_removing_|; DCHECKs that we can only start removing if we're
+  // not already removing, and vice-versa.
+  static void set_removing(bool is_removing);
+
+  // Creates a BrowsingDataRemover to remove browser data from the specified
+  // profile in the specified time range. Use Remove to initiate the removal.
+  BrowsingDataRemover(Profile* profile,
+                      base::Time delete_begin,
+                      base::Time delete_end);
+
   // BrowsingDataRemover deletes itself (using DeleteHelper) and is not supposed
   // to be deleted by other objects so make destructor private and DeleteHelper
   // a friend.
@@ -286,16 +308,9 @@ class BrowsingDataRemover : public content::NotificationObserver,
   // Callback from the above method.
   void OnClearedFormData();
 
-  // Calculate the begin time for the deletion range specified by |time_period|.
-  base::Time CalculateBeginDeleteTime(TimePeriod time_period);
-
   // Returns true if we're all done.
   bool AllDone();
 
-  // Setter for removing_; DCHECKs that we can only start removing if we're not
-  // already removing, and vice-versa.
-  static void set_removing(bool removing);
-
   content::NotificationRegistrar registrar_;
 
   // Profile we're to remove from.
@@ -318,7 +333,7 @@ class BrowsingDataRemover : public content::NotificationObserver,
   base::Time delete_end_;
 
   // True if Remove has been invoked.
-  static bool removing_;
+  static bool is_removing_;
 
   CacheState next_cache_state_;
   disk_cache::Backend* cache_;