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

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

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_
 
 #include <map>
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "build/build_config.h"
 #include "chrome/browser/extensions/api/identity/extension_token_key.h"
 #include "chrome/browser/extensions/api/identity/gaia_web_auth_flow.h"
 #include "chrome/browser/extensions/api/identity/identity_launch_web_auth_flow_function.h"
 #include "chrome/browser/extensions/api/identity/identity_mint_queue.h"
+#include "chrome/browser/extensions/api/identity/identity_remove_cached_auth_token_function.h"
 #include "chrome/browser/extensions/api/identity/identity_signin_flow.h"
 #include "chrome/browser/extensions/api/identity/web_auth_flow.h"
 #include "chrome/browser/extensions/chrome_extension_function.h"
 #include "components/signin/core/browser/profile_identity_provider.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
 #include "google_apis/gaia/account_tracker.h"
 #include "google_apis/gaia/oauth2_mint_token_flow.h"
 #include "google_apis/gaia/oauth2_token_service.h"
 
 class GoogleServiceAuthError;
@@ skipping 279 matching lines @@
 
   IdentityGetProfileUserInfoFunction();
 
  private:
   ~IdentityGetProfileUserInfoFunction() override;
 
   // UIThreadExtensionFunction implementation.
   ExtensionFunction::ResponseAction Run() override;
 };
 
-class IdentityRemoveCachedAuthTokenFunction : public UIThreadExtensionFunction {
- public:
-  DECLARE_EXTENSION_FUNCTION("identity.removeCachedAuthToken",
-                             EXPERIMENTAL_IDENTITY_REMOVECACHEDAUTHTOKEN)
-  IdentityRemoveCachedAuthTokenFunction();
-
- protected:
-  ~IdentityRemoveCachedAuthTokenFunction() override;
-
-  // ExtensionFunction:
-  ResponseAction Run() override;
-};
-
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_