Tracking push events for lucid sleep

extensions/browser/process_manager_observer.h

Index: extensions/browser/process_manager_observer.h
diff --git a/extensions/browser/process_manager_observer.h b/extensions/browser/process_manager_observer.h
index 413a34ef3a93781d6cf9ae7c64f1cb76a3c3876d..4b0dfd64143e52d6f0716457b26d081c10e884fd 100644
--- a/extensions/browser/process_manager_observer.h
+++ b/extensions/browser/process_manager_observer.h
@@ -15,6 +15,10 @@ class ProcessManagerObserver {
   // Called immediately after an extension background host is started.
   virtual void OnBackgroundHostStartup(const Extension* extension) {}
 
+  // Called immediately after an ExtensionHost for an extension with a lazy
+  // background page is created.
+  virtual void OnBackgroundHostCreated(ExtensionHost* host) {}
+
   // Called immediately after the extension background host is destroyed.
   virtual void OnBackgroundHostClose(const std::string& extension_id) {}
 };