Standardize usage of virtual/override/final in google_apis/

google_apis/gcm/base/fake_encryptor.h

Index: google_apis/gcm/base/fake_encryptor.h
diff --git a/google_apis/gcm/base/fake_encryptor.h b/google_apis/gcm/base/fake_encryptor.h
index 894d50b61ce4b2806f2391c23a4efa9a065a74f9..4277292280eccf0d1a3e2922d2dfe54910bd39ee 100644
--- a/google_apis/gcm/base/fake_encryptor.h
+++ b/google_apis/gcm/base/fake_encryptor.h
@@ -14,13 +14,13 @@ namespace gcm {
 // ciphertext.  Obviously, this should be used only for testing.
 class FakeEncryptor : public Encryptor {
  public:
-  virtual ~FakeEncryptor();
+  ~FakeEncryptor() override;
 
-  virtual bool EncryptString(const std::string& plaintext,
-                             std::string* ciphertext) override;
+  bool EncryptString(const std::string& plaintext,
+                     std::string* ciphertext) override;
 
-  virtual bool DecryptString(const std::string& ciphertext,
-                             std::string* plaintext) override;
+  bool DecryptString(const std::string& ciphertext,
+                     std::string* plaintext) override;
 };
 
 }  // namespace gcm