Revert of Reland: Switch components/password_manager code from IPC messages to Mojo.

components/password_manager/core/common/credential_manager_types.cc

Index: components/password_manager/core/common/credential_manager_types.cc
diff --git a/components/password_manager/core/common/credential_manager_types.cc b/components/password_manager/core/common/credential_manager_types.cc
index 6d431e1a114edaadd115bdc6df4864895a231b00..8f364867eb8d92b156ada0d45a856442b444a145 100644
--- a/components/password_manager/core/common/credential_manager_types.cc
+++ b/components/password_manager/core/common/credential_manager_types.cc
@@ -9,16 +9,8 @@
 
 namespace password_manager {
 
-std::ostream& operator<<(std::ostream& os, CredentialType value) {
-  switch (value) {
-    case CredentialType::CREDENTIAL_TYPE_EMPTY:
-      return os << "CredentialType::CREDENTIAL_TYPE_EMPTY";
-    case CredentialType::CREDENTIAL_TYPE_PASSWORD:
-      return os << "CredentialType::CREDENTIAL_TYPE_PASSWORD";
-    case CredentialType::CREDENTIAL_TYPE_FEDERATED:
-      return os << "CredentialType::CREDENTIAL_TYPE_FEDERATED";
-  }
-  return os << "Unknown CredentialType value: " << static_cast<int32_t>(value);
+std::ostream& operator<<(std::ostream& out, CredentialType type) {
+  return out << static_cast<int>(type);
 }
 
 CredentialInfo::CredentialInfo() : type(CredentialType::CREDENTIAL_TYPE_EMPTY) {