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

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

Index: chrome/browser/extensions/api/identity/identity_api.h
diff --git a/chrome/browser/extensions/api/identity/identity_api.h b/chrome/browser/extensions/api/identity/identity_api.h
index 61ccf0a1a76987a4b1afca77911e682ecff92bc2..b4976c59bd18d41eed5d92a22570be968eafe0cf 100644
--- a/chrome/browser/extensions/api/identity/identity_api.h
+++ b/chrome/browser/extensions/api/identity/identity_api.h
@@ -18,6 +18,7 @@
 #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_get_auth_token_function.h"
 #include "chrome/browser/extensions/api/identity/identity_get_profile_user_info_function.h"
 #include "chrome/browser/extensions/api/identity/identity_launch_web_auth_flow_function.h"
 #include "chrome/browser/extensions/api/identity/identity_mint_queue.h"
@@ -31,18 +32,13 @@
 #include "google_apis/gaia/oauth2_mint_token_flow.h"
 #include "google_apis/gaia/oauth2_token_service.h"
 
-class GoogleServiceAuthError;
-class MockGetAuthTokenFunction;
-
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 
-class GetAuthTokenFunctionTest;
 class IdentityGetAuthTokenFunction;
-class MockGetAuthTokenFunction;
 
 class IdentityTokenCacheValue {
  public:
@@ -151,145 +147,6 @@ class IdentityGetAccountsFunction : public ChromeUIThreadExtensionFunction {
   ExtensionFunction::ResponseAction Run() override;
 };
 
-// identity.getAuthToken fetches an OAuth 2 function for the
-// caller. The request has three sub-flows: non-interactive,
-// interactive, and sign-in.
-//
-// In the non-interactive flow, getAuthToken requests a token from
-// GAIA. GAIA may respond with a token, an error, or "consent
-// required". In the consent required cases, getAuthToken proceeds to
-// the second, interactive phase.
-//
-// The interactive flow presents a scope approval dialog to the
-// user. If the user approves the request, a grant will be recorded on
-// the server, and an access token will be returned to the caller.
-//
-// In some cases we need to display a sign-in dialog. Normally the
-// profile will be signed in already, but if it turns out we need a
-// new login token, there is a sign-in flow. If that flow completes
-// successfully, getAuthToken proceeds to the non-interactive flow.
-class IdentityGetAuthTokenFunction : public ChromeAsyncExtensionFunction,
-                                     public GaiaWebAuthFlow::Delegate,
-                                     public IdentityMintRequestQueue::Request,
-                                     public OAuth2MintTokenFlow::Delegate,
-                                     public IdentitySigninFlow::Delegate,
-                                     public OAuth2TokenService::Consumer {
- public:
-  DECLARE_EXTENSION_FUNCTION("identity.getAuthToken",
-                             EXPERIMENTAL_IDENTITY_GETAUTHTOKEN);
-
-  IdentityGetAuthTokenFunction();
-
-  const ExtensionTokenKey* GetExtensionTokenKeyForTest() {
-    return token_key_.get();
-  }
-
-  void Shutdown();
-
- protected:
-  ~IdentityGetAuthTokenFunction() override;
-
-  // IdentitySigninFlow::Delegate implementation:
-  void SigninSuccess() override;
-  void SigninFailed() override;
-
-  // GaiaWebAuthFlow::Delegate implementation:
-  void OnGaiaFlowFailure(GaiaWebAuthFlow::Failure failure,
-                         GoogleServiceAuthError service_error,
-                         const std::string& oauth_error) override;
-  void OnGaiaFlowCompleted(const std::string& access_token,
-                           const std::string& expiration) override;
-
-  // Starts a login access token request.
-  virtual void StartLoginAccessTokenRequest();
-
-  // OAuth2TokenService::Consumer implementation:
-  void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
-                         const std::string& access_token,
-                         const base::Time& expiration_time) override;
-  void OnGetTokenFailure(const OAuth2TokenService::Request* request,
-                         const GoogleServiceAuthError& error) override;
-
-  // Starts a mint token request to GAIA.
-  // Exposed for testing.
-  virtual void StartGaiaRequest(const std::string& login_access_token);
-
-  // Caller owns the returned instance.
-  // Exposed for testing.
-  virtual OAuth2MintTokenFlow* CreateMintTokenFlow();
-
-  std::unique_ptr<OAuth2TokenService::Request> login_token_request_;
-
- private:
-  FRIEND_TEST_ALL_PREFIXES(GetAuthTokenFunctionTest,
-                           ComponentWithChromeClientId);
-  FRIEND_TEST_ALL_PREFIXES(GetAuthTokenFunctionTest,
-                           ComponentWithNormalClientId);
-  FRIEND_TEST_ALL_PREFIXES(GetAuthTokenFunctionTest, InteractiveQueueShutdown);
-  FRIEND_TEST_ALL_PREFIXES(GetAuthTokenFunctionTest, NoninteractiveShutdown);
-
-  // ExtensionFunction:
-  bool RunAsync() override;
-
-  // Helpers to report async function results to the caller.
-  void StartAsyncRun();
-  void CompleteAsyncRun(bool success);
-  void CompleteFunctionWithResult(const std::string& access_token);
-  void CompleteFunctionWithError(const std::string& error);
-
-  // Initiate/complete the sub-flows.
-  void StartSigninFlow();
-  void StartMintTokenFlow(IdentityMintRequestQueue::MintType type);
-  void CompleteMintTokenFlow();
-
-  // IdentityMintRequestQueue::Request implementation:
-  void StartMintToken(IdentityMintRequestQueue::MintType type) override;
-
-  // OAuth2MintTokenFlow::Delegate implementation:
-  void OnMintTokenSuccess(const std::string& access_token,
-                          int time_to_live) override;
-  void OnMintTokenFailure(const GoogleServiceAuthError& error) override;
-  void OnIssueAdviceSuccess(const IssueAdviceInfo& issue_advice) override;
-
-#if defined(OS_CHROMEOS)
-  // Starts a login access token request for device robot account. This method
-  // will be called only in Chrome OS for:
-  // 1. Enterprise kiosk mode.
-  // 2. Whitelisted first party apps in public session.
-  virtual void StartDeviceLoginAccessTokenRequest();
-
-  bool IsOriginWhitelistedInPublicSession();
-#endif
-
-  // Methods for invoking UI. Overridable for testing.
-  virtual void ShowLoginPopup();
-  virtual void ShowOAuthApprovalDialog(const IssueAdviceInfo& issue_advice);
-
-  // Checks if there is a master login token to mint tokens for the extension.
-  bool HasLoginToken() const;
-
-  // Maps OAuth2 protocol errors to an error message returned to the
-  // developer in chrome.runtime.lastError.
-  std::string MapOAuth2ErrorToDescription(const std::string& error);
-
-  std::string GetOAuth2ClientId() const;
-
-  bool interactive_;
-  bool should_prompt_for_scopes_;
-  IdentityMintRequestQueue::MintType mint_token_flow_type_;
-  std::unique_ptr<OAuth2MintTokenFlow> mint_token_flow_;
-  OAuth2MintTokenFlow::Mode gaia_mint_token_mode_;
-  bool should_prompt_for_signin_;
-
-  std::unique_ptr<ExtensionTokenKey> token_key_;
-  std::string oauth2_client_id_;
-  // When launched in interactive mode, and if there is no existing grant,
-  // a permissions prompt will be popped up to the user.
-  IssueAdviceInfo issue_advice_;
-  std::unique_ptr<GaiaWebAuthFlow> gaia_web_auth_flow_;
-  std::unique_ptr<IdentitySigninFlow> signin_flow_;
-};
-
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_