Add virtual to some base classes that have virtual methods...

net/url_request/https_prober.h

Index: net/url_request/https_prober.h
===================================================================
--- net/url_request/https_prober.h	(revision 50795)
+++ net/url_request/https_prober.h	(working copy)
@@ -23,6 +23,8 @@
 class HTTPSProberDelegate {
  public:
   virtual void ProbeComplete(bool result) = 0;
+ protected:
+  virtual ~HTTPSProberDelegate() {}
 };
 
 // HTTPSProber is a singleton object that manages HTTPS probes. A HTTPS probe
@@ -30,7 +32,7 @@
 // transparently upgrading from HTTP to HTTPS (for example, for SPDY).
 class HTTPSProber : public URLRequest::Delegate {
  public:
-  HTTPSProber() { }
+  HTTPSProber() {}
 
   // HaveProbed returns true if the given host is known to have been probed
   // since the browser was last started.