Adding the --load-component-extension flag.

chrome/browser/extensions/component_loader.h

Index: chrome/browser/extensions/component_loader.h
diff --git a/chrome/browser/extensions/component_loader.h b/chrome/browser/extensions/component_loader.h
index ec7726975f7ae09c1253f8025e5b8858396beb75..5de83d321bd1a174593e70c16374c80ebb46221f 100644
--- a/chrome/browser/extensions/component_loader.h
+++ b/chrome/browser/extensions/component_loader.h
@@ -41,10 +41,17 @@ class ComponentLoader : public content::NotificationObserver {
   const Extension* Add(int manifest_resource_id,
                        const FilePath& root_directory);
 
+  // Loads a component extension from file system.
+  const Extension* AddFromCommandLine(const FilePath& path);

[Aaron Boodman, 2011/11/29 05:32:25]

The fact that this comes from a command line is a detail outside the scope of
this class. The method should be called something like AddOverride(), and the
comment should explain that it will override any previously registered component
extension with the same ID.

[SeRya, 2011/11/29 21:31:00]

Renamed to AddOrReplace

+
   // Unloads a component extension and removes it from the list of component
   // extensions to be loaded.
   void Remove(const FilePath& root_directory);
 
+  // Removes a component extension from the list of component
+  // extensions to be loaded.

[Aaron Boodman, 2011/11/29 05:32:25]

Nit: it looks like "extensions" fits on the previous line.

[SeRya, 2011/11/29 21:31:00]

Since now comment for the prev method reflects this one as well the comment
removed.

+  void Remove(const std::string& id);
+
   // Adds the default component extensions.
   //
   // Component extension manifests must contain a 'key' property with a unique
@@ -96,6 +103,9 @@ class ComponentLoader : public content::NotificationObserver {
   // Add the enterprise webstore extension, or reload it if already loaded.
   void AddOrReloadEnterpriseWebStore();
 
+  // Determine the extension id and unload the extension.

[Aaron Boodman, 2011/11/29 05:32:25]

Comment is incorrect, nothing is unloaded here.

[SeRya, 2011/11/29 21:31:00]

Fixed.

+  std::string GenerateId(const base::DictionaryValue* manifest);

[Aaron Boodman, 2011/11/29 05:32:25]

Nit: capitalize "ID".

[SeRya, 2011/11/29 21:31:00]

It is 'Id' everywhere except a few unit tests. Including Extension::GenerateId.

+
   PrefService* prefs_;
   PrefService* local_state_;