Introduce FakeChromeIdentity and FakeChromeIdentityService.

ios/public/provider/chrome/browser/signin/fake_chrome_identity_service.h

Index: ios/public/provider/chrome/browser/signin/fake_chrome_identity_service.h
diff --git a/ios/public/provider/chrome/browser/signin/fake_chrome_identity_service.h b/ios/public/provider/chrome/browser/signin/fake_chrome_identity_service.h
new file mode 100644
index 0000000000000000000000000000000000000000..dbec6dc7185ff4b35734c2e165941fbb367b6fa7
--- /dev/null
+++ b/ios/public/provider/chrome/browser/signin/fake_chrome_identity_service.h
@@ -0,0 +1,64 @@
+// Copyright 2016 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 IOS_PUBLIC_PROVIDER_CHROME_BROWSER_SIGNIN_FAKE_CHROME_IDENTITY_SERVICE_H_
+#define IOS_PUBLIC_PROVIDER_CHROME_BROWSER_SIGNIN_FAKE_CHROME_IDENTITY_SERVICE_H_
+
+#include "ios/public/provider/chrome/browser/signin/chrome_identity_service.h"
+
+#include "base/mac/scoped_nsobject.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+@class NSMutableArray;
+
+namespace ios {
+
+// A fake ChromeIdentityService used for testing.
+class FakeChromeIdentityService : public ChromeIdentityService {
+ public:
+  FakeChromeIdentityService();
+  ~FakeChromeIdentityService();
+
+  // Convenience method that returns the instance of
+  // |FakeChromeIdentityService| from the ChromeBrowserProvider.
+  static FakeChromeIdentityService* GetInstanceFromChromeProvider();
+
+  // ChromeIdentityService implementation.
+  bool IsValidIdentity(ChromeIdentity* identity) const override;
+  ChromeIdentity* GetIdentityWithGaiaID(
+      const std::string& gaia_id) const override;
+  bool HasIdentities() const override;
+  NSArray* GetAllIdentities() const override;
+  NSArray* GetAllIdentitiesSortedForDisplay() const override;
+  void ForgetIdentity(ChromeIdentity* identity,
+                      ForgetIdentityCallback callback) override;
+
+  MOCK_METHOD5(GetAccessToken,
+               void(ChromeIdentity* identity,
+                    const std::string& client_id,
+                    const std::string& client_secret,
+                    const std::set<std::string>& scopes,
+                    const ios::AccessTokenCallback& callback));
+
+  MOCK_METHOD1(GetMDMDeviceStatus,
+               ios::MDMDeviceStatus(NSDictionary* user_info));
+
+  MOCK_METHOD3(HandleMDMNotification,
+               bool(ChromeIdentity* identity,
+                    NSDictionary* user_info,
+                    ios::MDMStatusCallback callback));
+
+  // Adds the identities given their name.
+  void AddIdentities(NSArray* identitiesNames);
+
+  // Adds |identity| to the available identities.
+  void AddIdentity(ChromeIdentity* identity);
+
+ private:
+  base::scoped_nsobject<NSMutableArray> identities_;
+};
+
+}  // namespace ios
+
+#endif  // IOS_PUBLIC_PROVIDER_CHROME_BROWSER_SIGNIN_FAKE_CHROME_IDENTITY_SERVICE_H_