Move Ownership of IMUI to HistoryService.

chrome/browser/history/history.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // The history system runs on a background thread so that potentially slow
 // database operations don't delay the browser. This backend processing is
 // represented by HistoryBackend. The HistoryService's job is to dispatch to
 // that thread.
 //
 // Main thread                       History thread
 // -----------                       --------------
 // HistoryService <----------------> HistoryBackend
 //                                   -> HistoryDatabase
 //                                      -> SQLite connection to History
 //                                   -> ArchivedDatabase
 //                                      -> SQLite connection to Archived History
 //                                   -> TextDatabaseManager
 //                                      -> SQLite connection to one month's data
 //                                      -> SQLite connection to one month's data
 //                                      ...
 //                                   -> ThumbnailDatabase
 //                                      -> SQLite connection to Thumbnails
 //                                         (and favicons)
 
 #include "chrome/browser/history/history.h"
 
 #include "base/callback.h"
+#include "base/command_line.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "base/threading/thread.h"
 #include "chrome/browser/autocomplete/history_url_provider.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/history/history_backend.h"
 #include "chrome/browser/history/history_notifications.h"
 #include "chrome/browser/history/history_types.h"
 #include "chrome/browser/history/in_memory_database.h"
 #include "chrome/browser/history/in_memory_history_backend.h"
+#include "chrome/browser/history/in_memory_url_index.h"
 #include "chrome/browser/history/top_sites.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/profile_error_dialog.h"
 #include "chrome/browser/visitedlink/visitedlink_master.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/thumbnail_score.h"
 #include "chrome/common/url_constants.h"
 #include "content/browser/download/download_persistent_store_info.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_service.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
@@ skipping 117 matching lines @@
   return backend_loaded_;
 }
 
 void HistoryService::UnloadBackend() {
   if (!history_backend_)
     return;  // Already unloaded.
 
   // Get rid of the in-memory backend.
   in_memory_backend_.reset();
 
+  // Give the InMemoryURLIndex a chance to shutdown.
+  if (in_memory_url_index_.get())
+    in_memory_url_index_->ShutDown();
+
   // The backend's destructor must run on the history thread since it is not
   // threadsafe. So this thread must not be the last thread holding a reference
   // to the backend, or a crash could happen.
   //
   // We have a reference to the history backend. There is also an extra
   // reference held by our delegate installed in the backend, which
   // HistoryBackend::Closing will release. This means if we scheduled a call
   // to HistoryBackend::Closing and *then* released our backend reference, there
   // will be a race between us and the backend's Closing function to see who is
   // the last holder of a reference. If the backend thread's Closing manages to
@@ skipping 42 matching lines @@
 history::URLDatabase* HistoryService::InMemoryDatabase() {
   // NOTE: See comments in BackendLoaded() as to why we call
   // LoadBackendIfNecessary() here even though it won't affect the return value
   // for this call.
   LoadBackendIfNecessary();
   if (in_memory_backend_.get())
     return in_memory_backend_->db();
   return NULL;
 }
 
+#if 0

[Peter Kasting, 2012/02/04 02:20:31]

Shouldn't have #if 0s by commit time...

[mrossetti, 2012/02/04 04:30:53]

No, again I'm embarrassed.

 history::InMemoryURLIndex* HistoryService::InMemoryIndex() {
   // NOTE: See comments in BackendLoaded() as to why we call
   // LoadBackendIfNecessary() here even though it won't affect the return value
   // for this call.
   LoadBackendIfNecessary();
-  if (in_memory_backend_.get())
-    return in_memory_backend_->InMemoryIndex();
+  if (history_backend_.get())
+    return history_backend_->InMemoryIndex();
   return NULL;
 }
+#endif
 
 void HistoryService::SetSegmentPresentationIndex(int64 segment_id, int index) {
   ScheduleAndForget(PRIORITY_UI,
                     &HistoryBackend::SetSegmentPresentationIndex,
                     segment_id, index);
 }
 
 void HistoryService::SetKeywordSearchTermsForURL(const GURL& url,
                                                  TemplateURLID keyword_id,
                                                  const string16& term) {
@@ skipping 418 matching lines @@
                           bool no_db) {
   if (!thread_->Start()) {
     Cleanup();
     return false;
   }
 
   history_dir_ = history_dir;
   bookmark_service_ = bookmark_service;
   no_db_ = no_db;
 
+  if (profile_ && !CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableHistoryQuickProvider)) {
+    std::string languages =
+        profile_->GetPrefs()->GetString(prefs::kAcceptLanguages);
+    in_memory_url_index_.reset(
+        new history::InMemoryURLIndex(profile_, history_dir_, languages));
+    in_memory_url_index_->Init();
+  }
+
   // Create the history backend.
   LoadBackendIfNecessary();
   return true;
 }
 
 void HistoryService::ScheduleAutocomplete(HistoryURLProvider* provider,
                                           HistoryURLProviderParams* params) {
   ScheduleAndForget(PRIORITY_UI, &HistoryBackend::ScheduleAutocomplete,
                     scoped_refptr<HistoryURLProvider>(provider), params);
 }
@@ skipping 150 matching lines @@
     history::TopSites* ts = profile_->GetTopSitesWithoutCreating();
     if (ts)
       ts->MigrateFromHistory();
   }
 }
 
 void HistoryService::OnTopSitesReady() {
   ScheduleAndForget(PRIORITY_NORMAL,
                     &HistoryBackend::MigrateThumbnailsDatabase);
 }