Move session_id.{cc,h} from chrome/browser/sessions to components/sessions

chrome/browser/sessions/session_tab_helper.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/sessions/session_tab_helper.h"
 
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/session_service.h"
 #include "chrome/browser/sessions/session_service_factory.h"
@@ skipping 14 matching lines @@
 void SessionTabHelper::SetWindowID(const SessionID& id) {
   window_id_ = id;
 
   // Extension code in the renderer holds the ID of the window that hosts it.
   // Notify it that the window ID changed.
   web_contents()->GetRenderViewHost()->Send(
           new ExtensionMsg_UpdateBrowserWindowId(
           web_contents()->GetRenderViewHost()->GetRoutingID(), id.id()));
 }
 
+// static
+SessionID::id_type SessionTabHelper::IdForTab(const content::WebContents* tab) {
+  const SessionTabHelper* session_tab_helper =
+      tab ? SessionTabHelper::FromWebContents(tab) : NULL;
+  return session_tab_helper ? session_tab_helper->session_id().id() : -1;
+}
+
+// static
+SessionID::id_type SessionTabHelper::IdForWindowContainingTab(
+    const content::WebContents* tab) {
+  const SessionTabHelper* session_tab_helper =
+      tab ? SessionTabHelper::FromWebContents(tab) : NULL;
+  return session_tab_helper ? session_tab_helper->window_id().id() : -1;
+}
+
 void SessionTabHelper::RenderViewCreated(
     content::RenderViewHost* render_view_host) {
   render_view_host->Send(
       new ExtensionMsg_UpdateBrowserWindowId(render_view_host->GetRoutingID(),
                                              window_id_.id()));
 }
 
 void SessionTabHelper::UserAgentOverrideSet(const std::string& user_agent) {
 #if defined(ENABLE_SESSION_SERVICE)
   Profile* profile =
       Profile::FromBrowserContext(web_contents()->GetBrowserContext());
   SessionService* session = SessionServiceFactory::GetForProfile(profile);
   if (session)
     session->SetTabUserAgentOverride(window_id(), session_id(), user_agent);
 #endif
 }