"Top Document Isolation" mode

content/browser/site_instance_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_SITE_INSTANCE_IMPL_H_
 #define CONTENT_BROWSER_SITE_INSTANCE_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 26 matching lines @@
   int32_t GetId() override;
   bool HasProcess() const override;
   RenderProcessHost* GetProcess() override;
   BrowserContext* GetBrowserContext() const override;
   const GURL& GetSiteURL() const override;
   SiteInstance* GetRelatedSiteInstance(const GURL& url) override;
   bool IsRelatedSiteInstance(const SiteInstance* instance) override;
   size_t GetRelatedActiveContentsCount() override;
   bool RequiresDedicatedProcess() override;
 
+  SiteInstance* GetRelatedSiteInstanceForThirdPartySubframes(const GURL& url);

[Charlie Reis, 2016/03/18 21:15:13]

Maybe drop "Related" and |url|?

+
   // Set the web site that this SiteInstance is rendering pages for.
   // This includes the scheme and registered domain, but not the port.  If the
   // URL does not have a valid registered domain, then the full hostname is
   // stored.
   void SetSite(const GURL& url);
   bool HasSite() const;
 
   // Returns whether there is currently a related SiteInstance (registered with
   // BrowsingInstance) for the site of the given url.  If so, we should try to
   // avoid dedicating an unused SiteInstance to it (e.g., in a new tab).
@@ skipping 24 matching lines @@
   // that, unlike active_frame_count, this does not count pending RFHs.
   void IncrementRelatedActiveContentsCount();
 
   // Decrease the number of active WebContentses using this SiteInstance. Note
   // that, unlike active_frame_count, this does not count pending RFHs.
   void DecrementRelatedActiveContentsCount();
 
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
+  bool is_for_third_party_subframes() { return is_for_third_party_subframes_; }
+
   // Sets the global factory used to create new RenderProcessHosts.  It may be
   // NULL, in which case the default RenderProcessHost will be created (this is
   // the behavior if you don't call this function).  The factory must be set
   // back to NULL before it's destroyed; ownership is not transferred.
   static void set_render_process_host_factory(
       const RenderProcessHostFactory* rph_factory);
 
   // Get the effective URL for the given actual URL.  This allows the
   // ContentBrowserClient to override the SiteInstance's site for certain URLs.
   // For example, Chrome uses this to replace hosted app URLs with extension
@@ skipping 17 matching lines @@
   friend class SiteInstance;
 
   // Virtual to allow tests to extend it.
   ~SiteInstanceImpl() override;
 
   // Create a new SiteInstance.  Protected to give access to BrowsingInstance
   // and tests; most callers should use Create or GetRelatedSiteInstance
   // instead.
   explicit SiteInstanceImpl(BrowsingInstance* browsing_instance);
 
+  // Only BrowsingInstance should call this.
+  void set_is_for_third_party_subframes() {
+    CHECK(!HasSite());
+    is_for_third_party_subframes_ = true;
+  }
+
  private:
   // RenderProcessHostObserver implementation.
   void RenderProcessHostDestroyed(RenderProcessHost* host) override;
   void RenderProcessWillExit(RenderProcessHost* host) override;
   void RenderProcessExited(RenderProcessHost* host,
                            base::TerminationStatus status,
                            int exit_code) override;
 
   // Used to restrict a process' origin access rights.
   void LockToOrigin();
 
   // An object used to construct RenderProcessHosts.
   static const RenderProcessHostFactory* g_render_process_host_factory_;
 
   // The next available SiteInstance ID.
   static int32_t next_site_instance_id_;
 
   // A unique ID for this SiteInstance.
   int32_t id_;
 
   // The number of active frames in this SiteInstance.
-  size_t active_frame_count_;
+  size_t active_frame_count_ = 0;
 
   // BrowsingInstance to which this SiteInstance belongs.
   scoped_refptr<BrowsingInstance> browsing_instance_;
 
   // Current RenderProcessHost that is rendering pages for this SiteInstance.
   // This pointer will only change once the RenderProcessHost is destructed.  It
   // will still remain the same even if the process crashes, since in that
   // scenario the RenderProcessHost remains the same.
-  RenderProcessHost* process_;
+  RenderProcessHost* process_ = nullptr;
 
   // The web site that this SiteInstance is rendering pages for.
   GURL site_;
 
   // Whether SetSite has been called.
-  bool has_site_;
+  bool has_site_ = false;
+  bool is_for_third_party_subframes_ = false;
 
   base::ObserverList<Observer, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(SiteInstanceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SITE_INSTANCE_IMPL_H_