Removes unnecessary mock methods in fake identity service

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
index c3e52c47f30cdc8989e9edcd12b8ae4452470745..27e30f9c7d491230caeabb4659fe0fa61b419aac 100644
--- a/ios/public/provider/chrome/browser/signin/fake_chrome_identity_service.h
+++ b/ios/public/provider/chrome/browser/signin/fake_chrome_identity_service.h
@@ -42,21 +42,19 @@ class FakeChromeIdentityService : public ChromeIdentityService {
   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));
+  virtual void GetAccessToken(ChromeIdentity* identity,

[sdefresne, 2017/02/03 09:17:05]

This is a method overridden from ChromeIdentityService, so should be marked
override:

  void GetAccessToken(ChromeIdentity* identity,
                      const std::string& client_id,
                      const std::string& client_secret,
                      const std::set<std::string>& scoped,
                      const ios::AccessTokenCallback& callback) override;

[stkhapugin, 2017/02/03 10:12:33]

Done.

+                              const std::string& client_id,
+                              const std::string& client_secret,
+                              const std::set<std::string>& scopes,
+                              const ios::AccessTokenCallback& callback);
 
-  MOCK_METHOD2(GetAvatarForIdentity,
-               void(ChromeIdentity* identity, GetAvatarCallback callback));
+  virtual void GetAvatarForIdentity(ChromeIdentity* identity,

[sdefresne, 2017/02/03 09:17:05]

ditto

[stkhapugin, 2017/02/03 10:12:34]

Done.

+                                    GetAvatarCallback callback);
 
-  MOCK_METHOD1(GetCachedAvatarForIdentity, UIImage*(ChromeIdentity* identity));
+  virtual UIImage* GetCachedAvatarForIdentity(ChromeIdentity* identity);

[sdefresne, 2017/02/03 09:17:05]

ditto

[stkhapugin, 2017/02/03 10:12:33]

Done.

 
-  MOCK_METHOD2(GetHostedDomainForIdentity,
-               void(ChromeIdentity* identity,
-                    GetHostedDomainCallback callback));
+  virtual void GetHostedDomainForIdentity(ChromeIdentity* identity,

[sdefresne, 2017/02/03 09:17:06]

ditto

[stkhapugin, 2017/02/03 10:12:34]

Done.

+                                          GetHostedDomainCallback callback);
 
   MOCK_METHOD1(GetMDMDeviceStatus,
                ios::MDMDeviceStatus(NSDictionary* user_info));