Move Ownership of IMUI to HistoryService.

chrome/browser/history/in_memory_history_backend.h

Index: chrome/browser/history/in_memory_history_backend.h
===================================================================
--- chrome/browser/history/in_memory_history_backend.h	(revision 120346)
+++ chrome/browser/history/in_memory_history_backend.h	(working copy)
@@ -41,16 +41,9 @@
   virtual ~InMemoryHistoryBackend();
 
   // Initializes the backend from the history database pointed to by the
-  // full path in |history_filename|. |history_dir| is the path to the
-  // directory containing the history database and is also used
-  // as the directory where the InMemoryURLIndex's cache is kept. |db| is
-  // used for building the InMemoryURLIndex. |languages| gives the
-  // preferred user languages with which URLs and page titles are
-  // interpreted while decomposing into words and characters during indexing.
-  bool Init(const FilePath& history_filename,
-            const FilePath& history_dir,
-            URLDatabase* db,
-            const std::string& languages);
+  // full path in |history_filename|. |db| is used for setting up the
+  // InMemoryDatabase.
+  bool Init(const FilePath& history_filename, URLDatabase* db);
 
   // Does initialization work when this object is attached to the history
   // system on the main thread. The argument is the profile with which the
@@ -69,9 +62,6 @@
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
-  // Return the quick history index.
-  history::InMemoryURLIndex* InMemoryIndex() const { return index_.get(); }
-
  private:
   FRIEND_TEST_ALL_PREFIXES(HistoryBackendTest, DeleteAll);
 
@@ -95,9 +85,6 @@
   // initialization.
   Profile* profile_;
 
-  // The index used for quick history lookups.
-  scoped_ptr<history::InMemoryURLIndex> index_;
-
   DISALLOW_COPY_AND_ASSIGN(InMemoryHistoryBackend);
 };