chrome/browser/prerender/prerender_config.h

   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 #ifndef CHROME_BROWSER_PRERENDER_PRERENDER_CONFIG_H_
   6 #define CHROME_BROWSER_PRERENDER_PRERENDER_CONFIG_H_
   7
   8 #include <string>
   9
  10 #include "base/time/time.h"
  11 #include "ui/gfx/rect.h"
  12
  13 namespace prerender {
  14
  15 struct Config {
  16   Config();
  17   ~Config();
  18
  19   // Maximum memory use for a prerendered page until it is killed.
  20   size_t max_bytes;
  21
  22   // Number of simultaneous prerender pages from link elements allowed. Enforced
  23   // by PrerenderLinkManager.
  24   size_t max_link_concurrency;
  25
  26   // Number of simultaneous prerender pages from link elements allowed per
  27   // launching page. Enforced by PrerenderLinkManager.
  28   size_t max_link_concurrency_per_launcher;
  29
  30   // Is rate limiting enabled?
  31   bool rate_limit_enabled;
  32
  33   // The maximum time that a prerender can wait for launch in the
  34   // PrerenderLinkManager.
  35   base::TimeDelta max_wait_to_launch;
  36
  37   // The default time to live of a newly created prerender. May be shortened to
  38   // abandon_time_to_live, below.
  39   base::TimeDelta time_to_live;
  40
  41   // After a prerender has been abandoned by the user navigating away from the
  42   // source page or otherwise mooting the launcher, how long until the prerender
  43   // should be removed. This exists because a prerendered page is often
  44   // navigated to through a chain of redirects; removing the prerender when the
  45   // link element is removed because of navigation would destroy prerenders just
  46   // before they were going to be used.
  47   base::TimeDelta abandon_time_to_live;
  48
  49   // The default tab bounds used as the prerenderer tab size when the active tab
  50   // cannot be accessed.
  51   gfx::Rect default_tab_bounds;
  52
  53   // User agent being used as an override for the WebContents.
  54   std::string user_agent_override;
  55
  56   // Is the user agent being overridden for this NavigationEntry?
  57   bool is_overriding_user_agent;
  58 };
  59
  60 }  // namespace prerender
  61
  62 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_CONFIG_H_
  63