Move impl of identity.RemoveCachedAuthToken() extension API to its own file

chrome/browser/extensions/api/identity/identity_api.cc

Index: chrome/browser/extensions/api/identity/identity_api.cc
diff --git a/chrome/browser/extensions/api/identity/identity_api.cc b/chrome/browser/extensions/api/identity/identity_api.cc
index ffd17a90e85c5f924a4f8f19c979f13a8fb1c709..d10409bc48794e96db1dc4dab31eef19c11f774a 100644
--- a/chrome/browser/extensions/api/identity/identity_api.cc
+++ b/chrome/browser/extensions/api/identity/identity_api.cc
@@ -919,24 +919,4 @@ ExtensionFunction::ResponseAction IdentityGetProfileUserInfoFunction::Run() {
   return RespondNow(OneArgument(profile_user_info.ToValue()));
 }
 
-IdentityRemoveCachedAuthTokenFunction::IdentityRemoveCachedAuthTokenFunction() {
-}
-
-IdentityRemoveCachedAuthTokenFunction::
-    ~IdentityRemoveCachedAuthTokenFunction() {
-}
-
-ExtensionFunction::ResponseAction IdentityRemoveCachedAuthTokenFunction::Run() {
-  if (Profile::FromBrowserContext(browser_context())->IsOffTheRecord())
-    return RespondNow(Error(identity_constants::kOffTheRecord));
-
-  std::unique_ptr<identity::RemoveCachedAuthToken::Params> params(
-      identity::RemoveCachedAuthToken::Params::Create(*args_));
-  EXTENSION_FUNCTION_VALIDATE(params.get());
-  IdentityAPI::GetFactoryInstance()
-      ->Get(browser_context())
-      ->EraseCachedToken(extension()->id(), params->details.token);
-  return RespondNow(NoArguments());
-}
-
 }  // namespace extensions