Make favicons for about:history and about:bookmarks switch from lodpi to hidpi when dragging browser

chrome/browser/ui/webui/session_favicon_source.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/webui/session_favicon_source.h"
 
 #include "chrome/browser/sync/glue/session_model_associator.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/common/url_constants.h"
 
 using browser_sync::SessionModelAssociator;
 
 SessionFaviconSource::SessionFaviconSource(Profile* profile)
     : FaviconSource(profile,
                     FaviconSource::FAVICON,
                     chrome::kChromeUISessionFaviconHost) {
 }
 
 SessionFaviconSource::~SessionFaviconSource() {
 }
 
-void SessionFaviconSource::StartDataRequest(const std::string& path,
-                                            bool is_incognito,
-                                            int request_id) {
-  ProfileSyncService* sync_service =
-      ProfileSyncServiceFactory::GetInstance()->GetForProfile(profile_);
-  SessionModelAssociator* associator = sync_service ?
-      sync_service->GetSessionModelAssociator() : NULL;
-
-  std::string favicon_data;
-  if (associator &&
-      associator->GetSyncedFaviconForPageURL(path, &favicon_data)) {
-    scoped_refptr<base::RefCountedString> response =
-        new base::RefCountedString();
-    response->data() = favicon_data;
-    SendResponse(request_id, response);
-  } else {
-    FaviconSource::StartDataRequest(path, is_incognito, request_id);
-  }
-}
-
 std::string SessionFaviconSource::GetMimeType(const std::string&) const {
   return "image/png";
 }
 
 bool SessionFaviconSource::ShouldReplaceExistingSource() const {
   // Leave the existing DataSource in place, otherwise we'll drop any pending
   // requests on the floor.
   return false;
 }
 
 bool SessionFaviconSource::AllowCaching() const {
   // Prevent responses from being cached, otherwise session favicons won't
   // update in a timely manner.
   return false;
 }
+
+bool SessionFaviconSource::HandleMissingResource(const IconRequest& request) {
+  ProfileSyncService* sync_service =
+      ProfileSyncServiceFactory::GetInstance()->GetForProfile(profile_);
+  SessionModelAssociator* associator = sync_service ?
+      sync_service->GetSessionModelAssociator() : NULL;
+
+  std::string favicon_data;
+  if (associator &&
+      associator->GetSyncedFaviconForPageURL(request.request_path,
+                                             &favicon_data)) {
+    scoped_refptr<base::RefCountedString> response =
+        new base::RefCountedString();
+    response->data() = favicon_data;
+    SendResponse(request.request_id, response);
+    return true;
+  }
+  return false;
+}