Clear session-only data when all browser windows are closed.

chrome/browser/sessions/session_data_deleter.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 "base/bind.h"
+#include "base/command_line.h"
+#include "chrome/browser/browser_shutdown.h"
+#include "chrome/browser/net/chrome_url_request_context.h"
+#include "chrome/browser/prefs/session_startup_pref.h"
+#include "chrome/browser/profiles/profile_io_data.h"
+#include "chrome/browser/ui/startup/startup_browser_creator.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/dom_storage_context.h"
+#include "content/public/browser/local_storage_usage_info.h"
+#include "content/public/browser/storage_partition.h"
+#include "net/cookies/cookie_monster.h"
+#include "net/cookies/cookie_store.h"
+#include "net/cookies/cookie_util.h"
+#include "webkit/browser/quota/special_storage_policy.h"
+
+namespace {
+
+void CookieDeleted(bool success) {
+  DCHECK(success);
+}
+
+class SessionDataDeleter
+    : public base::RefCountedThreadSafe<SessionDataDeleter> {
+ public:
+  SessionDataDeleter(quota::SpecialStoragePolicy* storage_policy,
+                     bool delete_only_by_session_only_policy);
+
+  void Run(content::StoragePartition* storage_partition,
+           ProfileIOData* profile_io_data);
+
+ private:
+  friend class base::RefCountedThreadSafe<SessionDataDeleter>;
+  ~SessionDataDeleter();
+
+  // Deletes the local storage described by |usages| for origins which are
+  // session-only.
+  void ClearSessionOnlyLocalStorage(
+      content::StoragePartition* storage_partition,
+      const std::vector<content::LocalStorageUsageInfo>& usages);
+
+  // Deletes all cookies that are session only if
+  // |delete_only_by_session_only_policy_| is false. Once completed or skipped,
+  // this arranges for DeleteSessionOnlyOriginCookies to be called with a list
+  // of all remaining cookies.
+  void DeleteSessionCookiesOnIOThread(ProfileIOData* profile_io_data);
+
+  // Called when all session-only cookies have been deleted.
+  void DeleteSessionCookiesDone(int num_deleted);
+
+  // Deletes the cookies in |cookies| that are for origins which are
+  // session-only.
+  void DeleteSessionOnlyOriginCookies(const net::CookieList& cookies);
+
+  base::WeakPtr<ChromeURLRequestContext> request_context_;
+  scoped_refptr<quota::SpecialStoragePolicy> storage_policy_;
+  const bool delete_only_by_session_only_policy_;
+
+  DISALLOW_COPY_AND_ASSIGN(SessionDataDeleter);
+};
+
+SessionDataDeleter::SessionDataDeleter(
+    quota::SpecialStoragePolicy* storage_policy,
+    bool delete_only_by_session_only_policy)
+    : storage_policy_(storage_policy),
+      delete_only_by_session_only_policy_(delete_only_by_session_only_policy) {}
+
+void SessionDataDeleter::Run(content::StoragePartition* storage_partition,
+                             ProfileIOData* profile_io_data) {
+  storage_partition->GetDOMStorageContext()->GetLocalStorageUsage(
+      base::Bind(&SessionDataDeleter::ClearSessionOnlyLocalStorage,
+                 this,
+                 storage_partition));
+  content::BrowserThread::PostTask(
+      content::BrowserThread::IO,
+      FROM_HERE,
+      base::Bind(&SessionDataDeleter::DeleteSessionCookiesOnIOThread,
+                 this,
+                 profile_io_data));
+}
+
+SessionDataDeleter::~SessionDataDeleter() {}
+
+void SessionDataDeleter::ClearSessionOnlyLocalStorage(
+    content::StoragePartition* storage_partition,
+    const std::vector<content::LocalStorageUsageInfo>& usages) {
+  for (std::vector<content::LocalStorageUsageInfo>::const_iterator it =
+           usages.begin();
+       it != usages.end();
+       ++it) {
+    if (storage_policy_->IsStorageSessionOnly(it->origin))
+      storage_partition->GetDOMStorageContext()->DeleteLocalStorage(it->origin);
+  }
+}
+
+void SessionDataDeleter::DeleteSessionCookiesOnIOThread(
+    ProfileIOData* profile_io_data) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
+  ChromeURLRequestContext* request_context =
+      profile_io_data->GetMainRequestContext();
+  request_context_ = request_context->GetWeakPtr();
+  net::CookieMonster* cookie_monster =
+      request_context_->cookie_store()->GetCookieMonster();
+  if (delete_only_by_session_only_policy_) {
+    cookie_monster->GetAllCookiesAsync(
+        base::Bind(&SessionDataDeleter::DeleteSessionOnlyOriginCookies, this));
+  } else {
+    cookie_monster->DeleteSessionCookiesAsync(
+        base::Bind(&SessionDataDeleter::DeleteSessionCookiesDone, this));
+  }
+}
+
+void SessionDataDeleter::DeleteSessionCookiesDone(int num_deleted) {
+  ChromeURLRequestContext* request_context = request_context_.get();
+  if (!request_context)
+    return;
+
+  request_context->cookie_store()->GetCookieMonster()->GetAllCookiesAsync(
+      base::Bind(&SessionDataDeleter::DeleteSessionOnlyOriginCookies, this));
+}
+
+void SessionDataDeleter::DeleteSessionOnlyOriginCookies(
+    const net::CookieList& cookies) {
+  ChromeURLRequestContext* request_context = request_context_.get();
+  if (!request_context)
+    return;
+
+  net::CookieMonster* cookie_monster =
+      request_context->cookie_store()->GetCookieMonster();
+  for (net::CookieList::const_iterator it = cookies.begin();
+       it != cookies.end();
+       ++it) {
+    if (storage_policy_->IsStorageSessionOnly(
+            net::cookie_util::CookieOriginToURL(it->Domain(),
+                                                it->IsSecure()))) {
+      cookie_monster->DeleteCanonicalCookieAsync(*it,
+                                                 base::Bind(CookieDeleted));
+    }
+  }
+}
+
+}  // namespace
+
+void DeleteSessionOnlyData(Profile* profile) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  if (browser_shutdown::IsTryingToQuit())
+    return;
+
+#if defined(OS_ANDROID)
+  SessionStartupPref::Type startup_pref_type =
+      SessionStartupPref::GetDefaultStartupType();
+#else
+  SessionStartupPref::Type startup_pref_type =
+      StartupBrowserCreator::GetSessionStartupPref(
+          *CommandLine::ForCurrentProcess(), profile).type;
+#endif
+
+  scoped_refptr<SessionDataDeleter> deleter(
+      new SessionDataDeleter(profile->GetSpecialStoragePolicy(),
+                             startup_pref_type == SessionStartupPref::LAST));
+  deleter->Run(
+      Profile::GetDefaultStoragePartition(profile),
+      ProfileIOData::FromResourceContext(profile->GetResourceContext()));
+}