Add SetSupportsQuic method to explicitly specify server that supports QUIC.

components/cronet/android/url_request_context_adapter.h

Index: components/cronet/android/url_request_context_adapter.h
diff --git a/components/cronet/android/url_request_context_adapter.h b/components/cronet/android/url_request_context_adapter.h
index ef4fcd6deacd86b3671662c37384882a70d8b6e2..61564e98706b2c8d31c3a227c64e9ab2a50c48fe 100644
--- a/components/cronet/android/url_request_context_adapter.h
+++ b/components/cronet/android/url_request_context_adapter.h
@@ -66,6 +66,10 @@ class URLRequestContextAdapter : public net::URLRequestContextGetter {
   void StartNetLogToFile(const std::string& file_name);
   void StopNetLog();
 
+  void SetSupportsQuic(const net::HostPortPair& server,
+                       uint16 alternate_port,
+                       double probability);
+
  private:
   scoped_refptr<URLRequestContextAdapterDelegate> delegate_;
   scoped_ptr<net::URLRequestContext> context_;
@@ -77,9 +81,13 @@ class URLRequestContextAdapter : public net::URLRequestContextGetter {
 
   virtual ~URLRequestContextAdapter();
 
-  // Initializes |context_| on the IO thread.
+  // Initializes |context_| on the Network thread.
   void InitializeURLRequestContext(scoped_ptr<URLRequestContextConfig> config);
 
+  void SetSupportsQuicOnNetworkThread(const net::HostPortPair& server,
+                                      uint16 alternate_port,
+                                      double probability);
+
   DISALLOW_COPY_AND_ASSIGN(URLRequestContextAdapter);
 };