chrome/browser/tab_contents/tab_util.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/tab_contents/tab_util.h"
   6
   7 #include "chrome/browser/extensions/extension_service.h"
   8 #include "chrome/browser/profiles/profile.h"
   9 #include "chrome/browser/ui/webui/chrome_web_ui_controller_factory.h"
  10 #include "chrome/common/chrome_switches.h"
  11 #include "content/public/browser/render_view_host.h"
  12 #include "content/public/browser/site_instance.h"
  13 #include "content/public/browser/web_contents.h"
  14 #include "url/gurl.h"
  15
  16 using content::RenderViewHost;
  17 using content::SiteInstance;
  18 using content::WebContents;
  19
  20 namespace tab_util {
  21
  22 content::WebContents* GetWebContentsByID(int render_process_id,
  23                                          int render_view_id) {
  24   RenderViewHost* render_view_host =
  25       RenderViewHost::FromID(render_process_id, render_view_id);
  26   if (!render_view_host)
  27     return NULL;
  28
  29   return WebContents::FromRenderViewHost(render_view_host);
  30 }
  31
  32 SiteInstance* GetSiteInstanceForNewTab(Profile* profile,
  33                                        const GURL& url) {
  34   // If |url| is a WebUI or extension, we set the SiteInstance up front so that
  35   // we don't end up with an extra process swap on the first navigation.
  36   ExtensionService* service = profile->GetExtensionService();
  37   if (ChromeWebUIControllerFactory::GetInstance()->UseWebUIForURL(
  38           profile, url) ||
  39       (service &&
  40        service->extensions()->GetHostedAppByURL(url))) {
  41     return SiteInstance::CreateForURL(profile, url);
  42   }
  43
  44   // We used to share the SiteInstance for same-site links opened in new tabs,
  45   // to leverage the in-memory cache and reduce process creation.  It now
  46   // appears that it is more useful to have such links open in a new process,
  47   // so we create new tabs in a new BrowsingInstance.
  48   return NULL;
  49 }
  50
  51 }  // namespace tab_util