Move InMemoryURLIndex Caching Operations to FILE Thread

chrome/browser/history/in_memory_history_backend.cc

Index: chrome/browser/history/in_memory_history_backend.cc
===================================================================
--- chrome/browser/history/in_memory_history_backend.cc	(revision 117518)
+++ chrome/browser/history/in_memory_history_backend.cc	(working copy)
@@ -13,11 +13,9 @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/history/history_notifications.h"
 #include "chrome/browser/history/in_memory_database.h"
-#include "chrome/browser/history/in_memory_url_index.h"
 #include "chrome/browser/history/url_database.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_notification_types.h"
-#include "chrome/common/chrome_switches.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 
@@ -27,23 +25,14 @@
     : profile_(NULL) {
 }
 
-InMemoryHistoryBackend::~InMemoryHistoryBackend() {
-  if (index_.get())
-    index_->ShutDown();
-}
+InMemoryHistoryBackend::~InMemoryHistoryBackend() {}
 
 bool InMemoryHistoryBackend::Init(const FilePath& history_filename,
                                   const FilePath& history_dir,
                                   URLDatabase* db,
                                   const std::string& languages) {
   db_.reset(new InMemoryDatabase);
-  bool success = db_->InitFromDisk(history_filename);
-  if (!CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kDisableHistoryQuickProvider)) {
-    index_.reset(new InMemoryURLIndex(history_dir));
-    index_->Init(db, languages);
-  }
-  return success;
+  return db_->InitFromDisk(history_filename);
 }
 
 void InMemoryHistoryBackend::AttachToHistoryService(Profile* profile) {
@@ -131,8 +120,6 @@
       db_->UpdateURLRow(id, *i);
     else
       id = db_->AddURL(*i);
-    if (index_.get())
-      index_->UpdateURL(id, *i);
   }
 }
 
@@ -145,22 +132,15 @@
     db_.reset(new InMemoryDatabase);
     if (!db_->InitFromScratch())
       db_.reset();
-    if (index_.get())
-      index_->ReloadFromHistory(db_.get());
     return;
   }
 
   // Delete all matching URLs in our database.
-  for (std::set<GURL>::const_iterator i = details.urls.begin();
-       i != details.urls.end(); ++i) {
-    URLID id = db_->GetRowForURL(*i, NULL);
-    if (id) {
-      // We typically won't have most of them since we only have a subset of
-      // history, so ignore errors.
-      db_->DeleteURLRow(id);
-      if (index_.get())
-        index_->DeleteURL(id);
-    }
+  for (std::vector<URLRow>::const_iterator row = details.rows.begin();
+       row != details.rows.end(); ++row) {
+    // We typically won't have most of them since we only have a subset of
+    // history, so ignore errors.
+    db_->DeleteURLRow(row->id());
   }
 }