Perform install tasks for newly installed or upgraded component apps/extensions.

chrome/browser/extensions/extension_service.h

Index: chrome/browser/extensions/extension_service.h
diff --git a/chrome/browser/extensions/extension_service.h b/chrome/browser/extensions/extension_service.h
index 6aa659d315739e267089c22f799d5fb75d72f95d..f1546b6f1fc992e2728b02fdf9964a868231f797 100644
--- a/chrome/browser/extensions/extension_service.h
+++ b/chrome/browser/extensions/extension_service.h
@@ -130,6 +130,8 @@ class ExtensionServiceInterface : public syncer::SyncableService {
   virtual void CheckForUpdatesSoon() = 0;
 
   virtual void AddExtension(const extensions::Extension* extension) = 0;
+  virtual void AddComponentExtension(
+      const extensions::Extension* extension) = 0;
 
   virtual void UnloadExtension(
       const std::string& extension_id,
@@ -423,6 +425,12 @@ class ExtensionService
   // been loaded from a file and installed.
   virtual void AddExtension(const extensions::Extension* extension) OVERRIDE;
 
+  // Check if we have preferences for the component extension and, if not or if
+  // the stored version differs, install the extension (without requirements
+  // checking) before calling AddExtension.
+  virtual void AddComponentExtension(const extensions::Extension* extension)
+      OVERRIDE;
+
   // Called by the backend when an extension has been installed.
   void OnExtensionInstalled(
       const extensions::Extension* extension,
@@ -763,6 +771,15 @@ class ExtensionService
   // terminated extensions if it is there.
   void UntrackTerminatedExtension(const std::string& id);
 
+  // Update preferences for a new or updated extension; notify observers that
+  // the extension is installed, e.g., to update event handlers on background
+  // pages; and perform other extension install tasks before calling
+  // AddExtension.
+  void AddNewOrUpdatedExtension(
+      const extensions::Extension* extension,
+      const syncer::StringOrdinal& page_ordinal,
+      extensions::Extension::State initial_state);
+
   // Handles sending notification that |extension| was loaded.
   void NotifyExtensionLoaded(const extensions::Extension* extension);