Standardize usage of virtual/override/final in chrome/browser/extensions/

chrome/browser/extensions/api/principals_private/principals_private_api.h

Index: chrome/browser/extensions/api/principals_private/principals_private_api.h
diff --git a/chrome/browser/extensions/api/principals_private/principals_private_api.h b/chrome/browser/extensions/api/principals_private/principals_private_api.h
index 16f0ef03e42c6c9704695c385673baf83bcd6f6f..5f5d96e0c1745a596f25db6c3e5ec0f949a4b6c8 100644
--- a/chrome/browser/extensions/api/principals_private/principals_private_api.h
+++ b/chrome/browser/extensions/api/principals_private/principals_private_api.h
@@ -19,12 +19,12 @@ class PrincipalsPrivateExtensionFunction : public ChromeSyncExtensionFunction {
   PrincipalsPrivateExtensionFunction() {}
 
  protected:
-  virtual ~PrincipalsPrivateExtensionFunction() {}
+  ~PrincipalsPrivateExtensionFunction() override {}
 
   // ExtensionFunction:
   // Checks for the flag "new-profile-management", if set calls
   // RunSyncSafe which must be overriden by subclasses.
-  virtual bool RunSync() override final;
+  bool RunSync() final;
 
  private:
   virtual bool RunSyncSafe() = 0;
@@ -38,11 +38,11 @@ class PrincipalsPrivateSignOutFunction
   PrincipalsPrivateSignOutFunction() {}
 
  protected:
-  virtual ~PrincipalsPrivateSignOutFunction() {}
+  ~PrincipalsPrivateSignOutFunction() override {}
 
  private:
   // PrincipalsPrivateExtensionFunction
-  virtual bool RunSyncSafe() override;
+  bool RunSyncSafe() override;
 
   DISALLOW_COPY_AND_ASSIGN(PrincipalsPrivateSignOutFunction);
 };
@@ -55,11 +55,11 @@ class PrincipalsPrivateShowAvatarBubbleFunction
   PrincipalsPrivateShowAvatarBubbleFunction() {}
 
  protected:
-  virtual ~PrincipalsPrivateShowAvatarBubbleFunction() {}
+  ~PrincipalsPrivateShowAvatarBubbleFunction() override {}
 
  private:
   // PrincipalsPrivateExtensionFunction
-  virtual bool RunSyncSafe() override;
+  bool RunSyncSafe() override;
 
   DISALLOW_COPY_AND_ASSIGN(PrincipalsPrivateShowAvatarBubbleFunction);
 };