Move Extension::GetBasicInfo to a static helper.

chrome/common/extensions/extension.h

Index: chrome/common/extensions/extension.h
diff --git a/chrome/common/extensions/extension.h b/chrome/common/extensions/extension.h
index 2623f1806e8f3f63bd5f1827b57d6f4425b504ca..6db150e97d1fe4ac422142727aeb19aee1939a20 100644
--- a/chrome/common/extensions/extension.h
+++ b/chrome/common/extensions/extension.h
@@ -190,10 +190,6 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   // Returns true if the specified file is an extension.
   static bool IsExtension(const base::FilePath& file_name);
 
-  // Fills the |info| dictionary with basic information about the extension.
-  // |enabled| is injected for easier testing.
-  void GetBasicInfo(bool enabled, base::DictionaryValue* info) const;
-
   // See Type definition in Manifest.
   Manifest::Type GetType() const;