Standardize usage of virtual/override/final in content/renderer/

content/renderer/media/webrtc/peer_connection_dependency_factory.h

Index: content/renderer/media/webrtc/peer_connection_dependency_factory.h
diff --git a/content/renderer/media/webrtc/peer_connection_dependency_factory.h b/content/renderer/media/webrtc/peer_connection_dependency_factory.h
index 694fd2f05f3bd626f9c785fee5d5f6ea0731f13d..c42b0233fa3e7ec5081f9ed2720ee1a05bcf2659 100644
--- a/content/renderer/media/webrtc/peer_connection_dependency_factory.h
+++ b/content/renderer/media/webrtc/peer_connection_dependency_factory.h
@@ -133,10 +133,9 @@ class CONTENT_EXPORT PeerConnectionDependencyFactory
   // AecDumpMessageFilter::AecDumpDelegate implementation.
   // TODO(xians): Remove when option to disable audio track processing is
   // removed.
-  virtual void OnAecDumpFile(
-      const IPC::PlatformFileForTransit& file_handle) override;
-  virtual void OnDisableAecDump() override;
-  virtual void OnIpcClosing() override;
+  void OnAecDumpFile(const IPC::PlatformFileForTransit& file_handle) override;
+  void OnDisableAecDump() override;
+  void OnIpcClosing() override;
 
  protected:
   // Asks the PeerConnection factory to create a Local Audio Source.