base::RefCounted now DCHECKs when referenced from multiple threads.

content/browser/renderer_host/pepper/ssl_context_helper.h

Index: content/browser/renderer_host/pepper/ssl_context_helper.h
diff --git a/content/browser/renderer_host/pepper/ssl_context_helper.h b/content/browser/renderer_host/pepper/ssl_context_helper.h
index f1da2a6ee1dbc708c081619ab3dfad5d5cd62fa0..93e9652e1db7df03cba18a1f7fbe730c33249499 100644
--- a/content/browser/renderer_host/pepper/ssl_context_helper.h
+++ b/content/browser/renderer_host/pepper/ssl_context_helper.h
@@ -17,7 +17,8 @@ class TransportSecurityState;
 
 namespace content {
 
-class SSLContextHelper : public base::RefCounted<SSLContextHelper> {
+// TODO(mgiuca): Avoid using UnsafeRefCounted. http://crbug.com/469952.
+class SSLContextHelper : public base::UnsafeRefCounted<SSLContextHelper> {
  public:
   SSLContextHelper();
 
@@ -26,7 +27,7 @@ class SSLContextHelper : public base::RefCounted<SSLContextHelper> {
   const net::SSLConfig& ssl_config() { return ssl_config_; }
 
  private:
-  friend class base::RefCounted<SSLContextHelper>;
+  friend class base::UnsafeRefCounted<SSLContextHelper>;
 
   ~SSLContextHelper();