STH Set: Delay loading until after start-up.

chrome/browser/component_updater/sth_set_component_installer.h

Index: chrome/browser/component_updater/sth_set_component_installer.h
diff --git a/chrome/browser/component_updater/sth_set_component_installer.h b/chrome/browser/component_updater/sth_set_component_installer.h
index 90aec8ae778a182a171bf10bb140fb8d9e6f528f..994ac37900f0141f6d82b868ca935a3f629c67b1 100644
--- a/chrome/browser/component_updater/sth_set_component_installer.h
+++ b/chrome/browser/component_updater/sth_set_component_installer.h
@@ -12,6 +12,7 @@
 #include <vector>
 
 #include "base/gtest_prod_util.h"
+#include "base/memory/weak_ptr.h"
 #include "components/component_updater/default_component_installer.h"
 
 namespace base {
@@ -77,6 +78,8 @@ class STHSetComponentInstallerTraits : public ComponentInstallerTraits {
   // this class does. Typically the observer provided will be a global.
   net::ct::STHObserver* sth_observer_;
 
+  base::WeakPtrFactory<STHSetComponentInstallerTraits> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(STHSetComponentInstallerTraits);
 };