Move Ownership of IMUI to HistoryService.

chrome/browser/history/history_notifications.h

 // Copyright (c) 2006-2008 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.
 
 // Structs that hold data used in broadcasting notifications.
 
 #ifndef CHROME_BROWSER_HISTORY_HISTORY_NOTIFICATIONS_H__
 #define CHROME_BROWSER_HISTORY_HISTORY_NOTIFICATIONS_H__
 #pragma once
 
 #include <set>
 #include <vector>
 
 #include "googleurl/src/gurl.h"
 #include "chrome/browser/history/history_types.h"
 #include "chrome/browser/search_engines/template_url_id.h"
 
 namespace history {
 
 // Base class for history notifications. This needs only a virtual destructor
 // so that the history service's broadcaster can delete it when the request
 // is complete.
 struct HistoryDetails {
  public:
   virtual ~HistoryDetails() {}
 };
 
-// Details for HISTORY_URL_VISITED.
+// Details for NOTIFICATION_HISTORY_URL_VISITED.
 struct URLVisitedDetails : public HistoryDetails {
   URLVisitedDetails();
   virtual ~URLVisitedDetails();
 
   content::PageTransition transition;
   URLRow row;
 
   // A list of redirects leading up to the URL represented by this struct. If
   // we have the redirect chain A -> B -> C and this struct represents visiting
   // C, then redirects[0]=B and redirects[1]=A.  If there are no redirects,
   // this will be an empty vector.
   history::RedirectList redirects;
 };
 
-// Details for NOTIFY_HISTORY_TYPED_URLS_MODIFIED.
+// Details for NOTIFICATION_HISTORY_TYPED_URLS_MODIFIED.
 struct URLsModifiedDetails : public HistoryDetails {
   URLsModifiedDetails();
   virtual ~URLsModifiedDetails();
 
   // Lists the information for each of the URLs affected.
   std::vector<URLRow> changed_urls;
 };
 
-// Details for NOTIFY_HISTORY_URLS_DELETED.
+// Details for NOTIFICATION_HISTORY_URLS_DELETED.
 struct URLsDeletedDetails : public HistoryDetails {
   URLsDeletedDetails();
   virtual ~URLsDeletedDetails();
 
   // Set when all history was deleted. False means just a subset was deleted.
   bool all_history;
 
+  // The URLRows which have been deleted.
+  std::vector<URLRow> rows;
+
   // The list of unique URLs affected. This is valid only when a subset of
   // history is deleted. When all of it is deleted, this will be empty, since
-  // we do not bother to list all URLs.
+  // we do not bother to list all URLs. (This information can be gleaned from
+  // |rows| but, since there are several clients who need the set, we pre-build
+  // it so that the clients don't have to.)
   std::set<GURL> urls;
 };
 
 // Details for NOTIFY_URLS_STARRED.
 struct URLsStarredDetails : public HistoryDetails {
   explicit URLsStarredDetails(bool being_starred);
   virtual ~URLsStarredDetails();
 
   // The new starred state of the list of URLs. True when they are being
   // starred, false when they are being unstarred.
@@ skipping 17 matching lines @@
   virtual ~KeywordSearchTermDetails();
 
   GURL url;
   TemplateURLID keyword_id;
   string16 term;
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_NOTIFICATIONS_H__