Remove IdentityGetAuthTokenFunction interface dep on IdentityAPI

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

 // 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.
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 1176 matching lines @@
 
   // The real request will start processing, but wait in the queue behind
   // the blocker.
   func->set_mint_token_result(TestOAuth2MintTokenFlow::ISSUE_ADVICE_SUCCESS);
   RunFunctionAsync(func.get(), "[{\"interactive\": true}]");
   // Verify that we have fetched the login token and run the first flow.
   testing::Mock::VerifyAndClearExpectations(func.get());
   EXPECT_FALSE(func->scope_ui_shown());
 
   // After the request is canceled, the function will complete.
-  func->OnShutdown();
+  func->Shutdown();
   EXPECT_EQ(std::string(errors::kCanceled), WaitForError(func.get()));
   EXPECT_FALSE(func->login_ui_shown());
   EXPECT_FALSE(func->scope_ui_shown());
 
   QueueRequestComplete(type, &queued_request);
 }
 
 IN_PROC_BROWSER_TEST_F(GetAuthTokenFunctionTest, NoninteractiveShutdown) {
   SignIn("primary@example.com");
   scoped_refptr<const Extension> extension(CreateExtension(CLIENT_ID | SCOPES));
   scoped_refptr<FakeGetAuthTokenFunction> func(new FakeGetAuthTokenFunction());
   func->set_extension(extension.get());
 
   func->set_mint_token_flow(base::MakeUnique<TestHangOAuth2MintTokenFlow>());
   RunFunctionAsync(func.get(), "[{\"interactive\": false}]");
 
   // After the request is canceled, the function will complete.
-  func->OnShutdown();
+  func->Shutdown();
   EXPECT_EQ(std::string(errors::kCanceled), WaitForError(func.get()));
 }
 
 IN_PROC_BROWSER_TEST_F(GetAuthTokenFunctionTest,
                        InteractiveQueuedNoninteractiveFails) {
   SignIn("primary@example.com");
   scoped_refptr<const Extension> extension(CreateExtension(CLIENT_ID | SCOPES));
   scoped_refptr<FakeGetAuthTokenFunction> func(new FakeGetAuthTokenFunction());
   func->set_extension(extension.get());
 
@@ skipping 630 matching lines @@
   EXPECT_EQ(std::string("https://abcdefghij.chromiumapp.org/callback#test"),
             url);
 }
 
 }  // namespace extensions
 
 // Tests the chrome.identity API implemented by custom JS bindings .
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, ChromeIdentityJsBindings) {
   ASSERT_TRUE(RunExtensionTest("identity/js_bindings")) << message_;
 }