Implement ProcessReusePolicy for SiteInstances

content/browser/site_instance_impl.h

Index: content/browser/site_instance_impl.h
diff --git a/content/browser/site_instance_impl.h b/content/browser/site_instance_impl.h
index fc2ad85bd30738cf2167cc2bd8735aeebe7ced99..2e03203f26e7026dda5f77e2157a3b6753dd8958 100644
--- a/content/browser/site_instance_impl.h
+++ b/content/browser/site_instance_impl.h
@@ -51,6 +51,14 @@ class CONTENT_EXPORT SiteInstanceImpl final : public SiteInstance,
   bool RequiresDedicatedProcess() override;
   bool IsDefaultSubframeSiteInstance() const override;
 
+  void set_process_reuse_policy(
+      RenderProcessHostImpl::ProcessReusePolicy policy) {
+    process_reuse_policy_ = policy;
+  }
+  RenderProcessHostImpl::ProcessReusePolicy process_reuse_policy() const {
+    return process_reuse_policy_;
+  }
+
   // Returns the SiteInstance, related to this one, that should be used
   // for subframes when an oopif is required, but a dedicated process is not.
   // This SiteInstance will be created if it doesn't already exist. There is
@@ -101,13 +109,6 @@ class CONTENT_EXPORT SiteInstanceImpl final : public SiteInstance,
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
-  // 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
@@ -149,10 +150,6 @@ class CONTENT_EXPORT SiteInstanceImpl final : public SiteInstance,
       BrowserContext* browser_context,
       bool is_for_guests_only);
 
-  void set_is_default_subframe_site_instance() {
-    is_default_subframe_site_instance_ = true;
-  }
-
   // An object used to construct RenderProcessHosts.
   static const RenderProcessHostFactory* g_render_process_host_factory_;
 
@@ -180,10 +177,9 @@ class CONTENT_EXPORT SiteInstanceImpl final : public SiteInstance,
   // Whether SetSite has been called.
   bool has_site_;
 
-  // Whether this SiteInstance is the default subframe SiteInstance for its
-  // BrowsingInstance. Only one SiteInstance per BrowsingInstance can have this
-  // be true.
-  bool is_default_subframe_site_instance_;
+  // The ProcessReusePolicy to use when creating a RenderProcessHost for this
+  // SiteInstance.
+  RenderProcessHostImpl::ProcessReusePolicy process_reuse_policy_;
 
   base::ObserverList<Observer, true> observers_;