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 d031104656b50578dec7d663b263abeb968b162f..db81f6b9c041308dd99dcbb0f00188128f25773e 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);