Count number of origins with data affected by clearing "cookies and site data".

content/browser/dom_storage/dom_storage_context_wrapper.cc

 // Copyright 2013 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 "content/browser/dom_storage/dom_storage_context_wrapper.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 152 matching lines @@
 void DOMStorageContextWrapper::GetSessionStorageUsage(
     const GetSessionStorageUsageCallback& callback) {
   DCHECK(context_.get());
   context_->task_runner()->PostShutdownBlockingTask(
       FROM_HERE, DOMStorageTaskRunner::PRIMARY_SEQUENCE,
       base::Bind(&GetSessionStorageUsageHelper,
                  base::RetainedRef(base::ThreadTaskRunnerHandle::Get()),
                  base::RetainedRef(context_), callback));
 }
 
+

[msramek, 2017/01/09 12:54:44]

style: This empty line is superfluous.

 void DOMStorageContextWrapper::DeleteLocalStorageForPhysicalOrigin(
     const GURL& origin) {
   DCHECK(context_.get());
+  // TODO? This method sometimes leaves traces of localstorage behind that show

[msramek, 2017/01/09 12:54:44]

Let's file this one as a bug as well. Please leave a TODO with a bug number.

[dullweber, 2017/01/09 16:05:46]

I filed it as http://crbug.com/679344

+  // that there was localstorage for an origin. I didn't find a way to fix this.
   context_->task_runner()->PostShutdownBlockingTask(
       FROM_HERE, DOMStorageTaskRunner::PRIMARY_SEQUENCE,
       base::Bind(&DOMStorageContextImpl::DeleteLocalStorageForPhysicalOrigin,
                  context_, origin));
   if (mojo_state_)
     mojo_state_->DeleteStorageForPhysicalOrigin(url::Origin(origin));
 }
 
 void DOMStorageContextWrapper::DeleteLocalStorage(const GURL& origin) {
   DCHECK(context_.get());
@@ skipping 119 matching lines @@
     GetLocalStorageUsageCallback callback,
     std::vector<LocalStorageUsageInfo> usage) {
   context_->task_runner()->PostShutdownBlockingTask(
       FROM_HERE, DOMStorageTaskRunner::PRIMARY_SEQUENCE,
       base::Bind(&GetLocalStorageUsageHelper, base::Passed(&usage),
                  base::RetainedRef(base::ThreadTaskRunnerHandle::Get()),
                  base::RetainedRef(context_), callback));
 }
 
 }  // namespace content