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/profiles/profile.h"
   8 #include "chrome/browser/ui/webui/chrome_web_ui_controller_factory.h"
   9 #include "chrome/common/chrome_switches.h"
  10 #include "content/public/browser/render_view_host.h"
  11 #include "content/public/browser/site_instance.h"
  12 #include "content/public/browser/web_contents.h"
  13 #include "url/gurl.h"
  14
  15 #if defined(ENABLE_EXTENSIONS)
  16 #include "extensions/browser/extension_registry.h"
  17 #endif
  18
  19 using content::RenderViewHost;
  20 using content::SiteInstance;
  21 using content::WebContents;
  22
  23 namespace tab_util {
  24
  25 content::WebContents* GetWebContentsByID(int render_process_id,
  26                                          int render_view_id) {
  27   RenderViewHost* render_view_host =
  28       RenderViewHost::FromID(render_process_id, render_view_id);
  29   if (!render_view_host)
  30     return NULL;
  31   return WebContents::FromRenderViewHost(render_view_host);
  32 }
  33
  34 SiteInstance* GetSiteInstanceForNewTab(Profile* profile,
  35                                        const GURL& url) {
  36   // If |url| is a WebUI or extension, we set the SiteInstance up front so that
  37   // we don't end up with an extra process swap on the first navigation.
  38   if (ChromeWebUIControllerFactory::GetInstance()->UseWebUIForURL(profile, url))
  39     return SiteInstance::CreateForURL(profile, url);
  40
  41 #if defined(ENABLE_EXTENSIONS)
  42    if (extensions::ExtensionRegistry::Get(
  43        profile)->enabled_extensions().GetHostedAppByURL(url))
  44      return SiteInstance::CreateForURL(profile, url);
  45 #endif
  46
  47   // We used to share the SiteInstance for same-site links opened in new tabs,
  48   // to leverage the in-memory cache and reduce process creation.  It now
  49   // appears that it is more useful to have such links open in a new process,
  50   // so we create new tabs in a new BrowsingInstance.
  51   return NULL;
  52 }
  53
  54 }  // namespace tab_util