[credentialsmanager] Remove redundant tests

third_party/WebKit/LayoutTests/http/tests/credentialmanager/credentialscontainer-get-basics-expected.txt

Index: third_party/WebKit/LayoutTests/http/tests/credentialmanager/credentialscontainer-get-basics-expected.txt
diff --git a/third_party/WebKit/LayoutTests/http/tests/credentialmanager/credentialscontainer-get-basics-expected.txt b/third_party/WebKit/LayoutTests/http/tests/credentialmanager/credentialscontainer-get-basics-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..15c75d342b8d4a1722d7aceceb2c3ed7e7396ee9
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+++ b/third_party/WebKit/LayoutTests/http/tests/credentialmanager/credentialscontainer-get-basics-expected.txt
@@ -0,0 +1,37 @@
+CONSOLE WARNING: line 79: The boolean flag CredentialRequestOptions.unmediated is deprecated and will be removed in M62, around October 2017. Please use the CredentialRequestOptions.mediation enum instead. See https://www.chromestatus.com/features/6076479909658624 for more details.
+CONSOLE WARNING: line 168: Passing 'PasswordCredential' objects into 'fetch(..., { credentials: ... })' is deprecated, and will be removed in M62, around October 2017. See https://www.chromestatus.com/features/5689327799500800 for more details and https://www.chromium.org/developers/recent-changes-credential-management-api for migration suggestions.
+CONSOLE WARNING: line 169: Passing 'PasswordCredential' objects into 'fetch(..., { credentials: ... })' is deprecated, and will be removed in M62, around October 2017. See https://www.chromestatus.com/features/5689327799500800 for more details and https://www.chromium.org/developers/recent-changes-credential-management-api for migration suggestions.
+CONSOLE WARNING: line 170: Passing 'PasswordCredential' objects into 'fetch(..., { credentials: ... })' is deprecated, and will be removed in M62, around October 2017. See https://www.chromestatus.com/features/5689327799500800 for more details and https://www.chromium.org/developers/recent-changes-credential-management-api for migration suggestions.
+This is a testharness.js-based test.
+PASS navigator.credentials.get() with no argument. 
+PASS navigator.credentials.get({}). 
+PASS navigator.credentials.get() with a valid options including FederatedCredentialRequestOptions. 
+PASS navigator.credentials.get() with a valid options including password and unmediated. 
+PASS navigator.credentials.get() with a valid options including federated and unmediated. 
+PASS navigator.credentials.get() with a valid options including federated, password and unmediated. 
+PASS navigator.credentials.get() with a valid options including unmediated. 
+PASS navigator.credentials.get() with a valid options including mediation. 
+PASS navigator.credentials.get() with an options including an unknown attribute. 
+PASS Verify that the mock returns the values we give it. 
+PASS Credential interface: existence and properties of interface object 
+PASS Credential interface object length 
+PASS Credential interface object name 
+PASS Credential interface: existence and properties of interface prototype object 
+PASS Credential interface: existence and properties of interface prototype object's "constructor" property 
+PASS Credential interface: attribute id 
+PASS Credential interface: attribute type 
+PASS PasswordCredential interface: existence and properties of interface object 
+PASS PasswordCredential interface object length 
+PASS PasswordCredential interface object name 
+PASS PasswordCredential interface: existence and properties of interface prototype object 
+PASS PasswordCredential interface: existence and properties of interface prototype object's "constructor" property 
+PASS PasswordCredential interface: attribute password 
+PASS PasswordCredential interface: attribute name 
+PASS PasswordCredential interface: attribute iconURL 
+PASS PasswordCredential interface: c must inherit property "password" with the proper type (0) 
+PASS PasswordCredential interface: c must inherit property "name" with the proper type (1) 
+PASS PasswordCredential interface: c must inherit property "iconURL" with the proper type (2) 
+PASS Credential interface: c must inherit property "id" with the proper type (0) 
+PASS Credential interface: c must inherit property "type" with the proper type (1) 
+Harness: the test ran to completion.
+