Remove TextDatabase from the history service.

chrome/browser/history/history_backend.h

Index: chrome/browser/history/history_backend.h
diff --git a/chrome/browser/history/history_backend.h b/chrome/browser/history/history_backend.h
index 495fc0dc68eb330b2b971d4005af83cb9edbd826..5e816d46b0163289036fab2ee7b3638e14db5f82 100644
--- a/chrome/browser/history/history_backend.h
+++ b/chrome/browser/history/history_backend.h
@@ -19,7 +19,6 @@
 #include "chrome/browser/history/history_database.h"
 #include "chrome/browser/history/history_marshaling.h"
 #include "chrome/browser/history/history_types.h"
-#include "chrome/browser/history/text_database_manager.h"
 #include "chrome/browser/history/thumbnail_database.h"
 #include "chrome/browser/history/visit_tracker.h"
 #include "chrome/browser/search_engines/template_url_id.h"
@@ -161,11 +160,6 @@ class HistoryBackend : public base::RefCountedThreadSafe<HistoryBackend>,
                              const GURL& url,
                              base::Time end_ts);
 
-
-  // Indexing ------------------------------------------------------------------
-
-  void SetPageContents(const GURL& url, const string16& contents);
-
   // Querying ------------------------------------------------------------------
 
   // ScheduleAutocomplete() never frees |provider| (which is globally live).
@@ -641,9 +635,6 @@ class HistoryBackend : public base::RefCountedThreadSafe<HistoryBackend>,
                         const string16& text_query,
                         const QueryOptions& options,
                         QueryResults* result);
-  void QueryHistoryFTS(const string16& text_query,
-                       const QueryOptions& options,
-                       QueryResults* result);
 
   // Committing ----------------------------------------------------------------
 
@@ -826,6 +817,9 @@ class HistoryBackend : public base::RefCountedThreadSafe<HistoryBackend>,
   // The IDs of the URLs may change.
   bool ClearAllMainHistory(const URLRows& kept_urls);
 
+  // Deletes the FTS index database files, which are no longer used.
+  void DeleteFTSIndexDatabases();
+
   // Returns the BookmarkService, blocking until it is loaded. This may return
   // NULL during testing.
   BookmarkService* GetBookmarkService();
@@ -858,10 +852,6 @@ class HistoryBackend : public base::RefCountedThreadSafe<HistoryBackend>,
   // Stores old history in a larger, slower database.
   scoped_ptr<ArchivedDatabase> archived_db_;
 
-  // Full text database manager, possibly NULL if the database could not be
-  // created.
-  scoped_ptr<TextDatabaseManager> text_database_;
-
   // Manages expiration between the various databases.
   ExpireHistoryBackend expirer_;