Manifest handler for all keys background-related.

chrome/common/extensions/manifest_handler.h

Index: chrome/common/extensions/manifest_handler.h
diff --git a/chrome/common/extensions/manifest_handler.h b/chrome/common/extensions/manifest_handler.h
index 63380c7c4fed07bdf92c8039d491ecfb6789e422..45dce42f687b30df803681e6687b7fc82ca98714 100644
--- a/chrome/common/extensions/manifest_handler.h
+++ b/chrome/common/extensions/manifest_handler.h
@@ -31,12 +31,12 @@ class ManifestHandler {
   // are present. This allows specifying a default parsed value for
   // extensions that don't declare our key in the manifest.
   // TODO(yoz): Use Feature availability instead.
-  virtual bool AlwaysParseForType(Manifest::Type type);
+  virtual bool AlwaysParseForType(Manifest::Type type) const;
 
   // The list of keys that, if present, should be parsed before calling our
   // Parse (typically, because our Parse needs to read those keys).
   // Defaults to empty.
-  virtual const std::vector<std::string>& PrerequisiteKeys();
+  virtual const std::vector<std::string>& PrerequisiteKeys() const;
 
   // Associate |handler| with |key| in the manifest. A handler can register
   // for multiple keys. The global registry takes ownership of |handler|;