Provide a way for RenderProcessHosts to register themselves in the global host map.

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
===================================================================
--- content/browser/renderer_host/render_process_host_impl.cc	(revision 110616)
+++ content/browser/renderer_host/render_process_host_impl.cc	(working copy)
@@ -249,14 +249,14 @@
   return content::GetContentClient()->browser()->IsSuitableHost(host, site_url);
 }
 
-}  // namespace
-
 // the global list of all renderer processes
 base::LazyInstance<
     IDMap<content::RenderProcessHost>,
     base::LeakyLazyInstanceTraits<IDMap<content::RenderProcessHost> > >
         g_all_hosts = LAZY_INSTANCE_INITIALIZER;
 
+}  // namespace
+
 // static
 bool g_run_renderer_in_process_ = false;
 
@@ -323,7 +323,7 @@
       base::PLATFORM_FILE_WRITE);
 
   CHECK(!content::ExitedMainMessageLoop());
-  g_all_hosts.Get().AddWithID(this, GetID());
+  RegisterHost(GetID(), this);
   g_all_hosts.Get().set_check_on_null_data(true);
   // Initialize |child_process_activity_time_| to a reasonable value.
   mark_child_process_activity_time();
@@ -344,8 +344,7 @@
   }
 
   ClearTransportDIBCache();
-  if (g_all_hosts.Get().Lookup(GetID()))
-    g_all_hosts.Get().Remove(GetID());
+  UnregisterHost(GetID());
 }
 
 void RenderProcessHostImpl::EnableSendQueue() {
@@ -1104,6 +1103,17 @@
 }
 
 // static
+void RenderProcessHostImpl::RegisterHost(int host_id,
+                                         content::RenderProcessHost* host) {
+  g_all_hosts.Get().AddWithID(host, host_id);
+}
+
+void RenderProcessHostImpl::UnregisterHost(int host_id) {
+  if (g_all_hosts.Get().Lookup(host_id))
+    g_all_hosts.Get().Remove(host_id);
+}
+
+// static
 bool content::RenderProcessHost::run_renderer_in_process() {
   return g_run_renderer_in_process_;
 }