virtual SupportsType supportsMIMEType(const WebString& mimeType) = 0;
virtual SupportsType supportsImageMIMEType(const WebString& mimeType) = 0;
+ virtual SupportsType supportsImagePrefixedMIMEType(const WebString& mimeType) = 0;
virtual SupportsType supportsJavaScriptMIMEType(const WebString& mimeType) = 0;
virtual SupportsType supportsMediaMIMEType(const WebString& mimeType, const WebString& codecs, const WebString& keySystem) = 0;