Extensions: Move IsIncognitoEnabled to extensions/ from chrome/.

chrome/browser/extensions/extension_util.h

Index: chrome/browser/extensions/extension_util.h
diff --git a/chrome/browser/extensions/extension_util.h b/chrome/browser/extensions/extension_util.h
index ddb96f468ac2e58d52ae2a9603b9d02c6a8a163b..848bb34fdb701c02380a67e11dae9496b1219b41 100644
--- a/chrome/browser/extensions/extension_util.h
+++ b/chrome/browser/extensions/extension_util.h
@@ -30,10 +30,6 @@ class Extension;
 
 namespace util {
 
-// Returns true if |extension_id| can run in an incognito window.
-bool IsIncognitoEnabled(const std::string& extension_id,
-                        content::BrowserContext* context);
-
 // Sets whether |extension_id| can run in an incognito window. Reloads the
 // extension if it's enabled since this permission is applied at loading time
 // only. Note that an ExtensionService must exist.