Make DownloadHistory observe manager, items

chrome/browser/history/history_backend.cc

Index: chrome/browser/history/history_backend.cc
diff --git a/chrome/browser/history/history_backend.cc b/chrome/browser/history/history_backend.cc
index 6e29984aa42d0d88eeeff59cf691bf31535bc51f..15f5bc8372506d1915aba324dda1b12a8e0964ba 100644
--- a/chrome/browser/history/history_backend.cc
+++ b/chrome/browser/history/history_backend.cc
@@ -23,6 +23,7 @@
 #include "chrome/browser/api/bookmarks/bookmark_service.h"
 #include "chrome/browser/autocomplete/history_url_provider.h"
 #include "chrome/browser/cancelable_request.h"
+#include "chrome/browser/history/download_persistent_store_info.h"
 #include "chrome/browser/history/history_notifications.h"
 #include "chrome/browser/history/history_publisher.h"
 #include "chrome/browser/history/in_memory_history_backend.h"
@@ -33,7 +34,6 @@
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/url_constants.h"
-#include "content/public/browser/download_persistent_store_info.h"
 #include "googleurl/src/gurl.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
@@ -1204,12 +1204,12 @@ void HistoryBackend::GetNextDownloadId(
 
 // Get all the download entries from the database.
 void HistoryBackend::QueryDownloads(
-    scoped_refptr<DownloadQueryRequest> request) {
-  if (request->canceled())
-    return;
+    const HistoryService::DownloadQueryCallback& callback) {
+  scoped_ptr<std::vector<DownloadPersistentStoreInfo> > results(
+      new std::vector<DownloadPersistentStoreInfo>());
   if (db_.get())
-    db_->QueryDownloads(&request->value);
-  request->ForwardResult(&request->value);
+    db_->QueryDownloads(results.get());
+  callback.Run(results.Pass());
 }
 
 // Clean up entries that has been corrupted (because of the crash, for example).
@@ -1223,40 +1223,34 @@ void HistoryBackend::CleanUpInProgressEntries() {
 
 // Update a particular download entry.
 void HistoryBackend::UpdateDownload(
-    const content::DownloadPersistentStoreInfo& data) {
+    const DownloadPersistentStoreInfo& data) {
   if (db_.get())
     db_->UpdateDownload(data);
 }
 
-// Update the path of a particular download entry.
-void HistoryBackend::UpdateDownloadPath(const FilePath& path,
-                                        int64 db_handle) {
-  if (db_.get())
-    db_->UpdateDownloadPath(path, db_handle);
-}
-
 // Create a new download entry and pass back the db_handle to it.
 void HistoryBackend::CreateDownload(
-    scoped_refptr<DownloadCreateRequest> request,
-    int32 id,
-    const content::DownloadPersistentStoreInfo& history_info) {
+    const DownloadPersistentStoreInfo& history_info,
+    const HistoryService::DownloadCreateCallback& callback) {
   int64 db_handle = 0;
-  if (!request->canceled()) {
-    if (db_.get())
-      db_handle = db_->CreateDownload(history_info);
-    request->ForwardResult(id, db_handle);
-  }
+  if (db_.get())
+    db_handle = db_->CreateDownload(history_info);
+  callback.Run(db_handle);
 }
 
-void HistoryBackend::RemoveDownload(int64 db_handle) {
-  if (db_.get())
-    db_->RemoveDownload(db_handle);
+void HistoryBackend::GetVisibleVisitCountToHostSimple(
+    const GURL& url,
+    const HistoryService::GetVisibleVisitCountToHostSimpleCallback& callback) {
+  int count = 0;
+  Time first_visit;
+  const bool success = db_.get() &&
+      db_->GetVisibleVisitCountToHost(url, &count, &first_visit);
+  callback.Run(success, count, first_visit);
 }
 
-void HistoryBackend::RemoveDownloadsBetween(const Time remove_begin,
-                                            const Time remove_end) {
+void HistoryBackend::RemoveDownloads(const std::set<int64>& handles) {
   if (db_.get())
-    db_->RemoveDownloadsBetween(remove_begin, remove_end);
+    db_->RemoveDownloads(handles);
 }
 
 void HistoryBackend::QueryHistory(scoped_refptr<QueryHistoryRequest> request,
@@ -2317,7 +2311,7 @@ bool HistoryBackend::SetFaviconMappingsForPage(
     }
   }
 
-  for (size_t i = 0; i < unmapped_icon_ids.size(); ++i ) {
+  for (size_t i = 0; i < unmapped_icon_ids.size(); ++i) {
     thumbnail_db_->AddIconMapping(page_url, unmapped_icon_ids[i]);
     mappings_changed = true;
   }