Change manifest handler interface to always (implicitly) pass the entire manifest to handlers.

chrome/common/extensions/api/commands/commands_handler.h

Index: chrome/common/extensions/api/commands/commands_handler.h
diff --git a/chrome/common/extensions/api/commands/commands_handler.h b/chrome/common/extensions/api/commands/commands_handler.h
index a426a0fa2f155f3481892297c42759d95205d901..6e4d7cca61c9bf63a71facc0c66d7ae538577b7c 100644
--- a/chrome/common/extensions/api/commands/commands_handler.h
+++ b/chrome/common/extensions/api/commands/commands_handler.h
@@ -39,11 +39,8 @@ class CommandsHandler : public ManifestHandler {
   CommandsHandler();
   virtual ~CommandsHandler();
 
-  virtual bool Parse(const base::Value* value,
-                     Extension* extension,
-                     string16* error) OVERRIDE;
-
-  virtual bool HasNoKey(Extension* extension, string16* error) OVERRIDE;
+  virtual bool Parse(Extension* extension, string16* error) OVERRIDE;
+  virtual bool AlwaysParseForType(Extension::Type type) OVERRIDE;
 
  private:
   // If the extension defines a browser action, but no command for it, then