Implement declarativeContent API.

chrome/browser/extensions/extension_action.cc

Index: chrome/browser/extensions/extension_action.cc
diff --git a/chrome/browser/extensions/extension_action.cc b/chrome/browser/extensions/extension_action.cc
index c193f4c98f329d9ffef7f1159add92cd51dae943..3e0aa9617039a02cf2485f66082c3cbc359a0959 100644
--- a/chrome/browser/extensions/extension_action.cc
+++ b/chrome/browser/extensions/extension_action.cc
@@ -272,6 +272,15 @@ bool ExtensionAction::SetAppearance(int tab_id, Appearance new_appearance) {
   return true;
 }
 
+void ExtensionAction::SetDeclarativeAppearance(int tab_id, Appearance value) {
+  DCHECK_NE(tab_id, kDefaultTabId);
+  SetValue(&declarative_appearance_, tab_id, value);
+}
+
+void ExtensionAction::ClearDeclarativeAppearance(int tab_id) {
+  declarative_appearance_.erase(tab_id);
+}
+
 void ExtensionAction::ClearAllValuesForTab(int tab_id) {
   popup_url_.erase(tab_id);
   title_.erase(tab_id);