Implement sidebar support for extension action popups

chrome/common/extensions/api/extension_action/action_info.cc

Index: chrome/common/extensions/api/extension_action/action_info.cc
diff --git a/chrome/common/extensions/api/extension_action/action_info.cc b/chrome/common/extensions/api/extension_action/action_info.cc
index 8cf0386d3613ed37f4524ca95cfa98975ac805c4..4283c5d1c4703b3b35f358d7c8a12c64687641a7 100644
--- a/chrome/common/extensions/api/extension_action/action_info.cc
+++ b/chrome/common/extensions/api/extension_action/action_info.cc
@@ -182,6 +182,11 @@ scoped_ptr<ActionInfo> ActionInfo::Load(const Extension* extension,
     }
   }
 
+  // Should open popup in sidebar?
+  if (!dict->GetBoolean(keys::kPageActionOpenInSidebar,
+                        &result->open_in_sidebar))
+    result->open_in_sidebar = false;
+
   return result.Pass();
 }