Add SetSupportsQuic method to explicitly specify server that supports QUIC.

components/cronet/android/chromium_url_request.cc

Index: components/cronet/android/chromium_url_request.cc
diff --git a/components/cronet/android/chromium_url_request.cc b/components/cronet/android/chromium_url_request.cc
index be31c17ed5c5d74534a425e8c42781f8074c84b5..7239931fdb64e555586622fc53c23e75e4d1f78a 100644
--- a/components/cronet/android/chromium_url_request.cc
+++ b/components/cronet/android/chromium_url_request.cc
@@ -387,4 +387,16 @@ static void GetAllHeaders(JNIEnv* env,
       env, object, headersMap, NULL, status_line.Release());
 }
 
+static jstring GetNegotiatedProtocol(JNIEnv* env,
+                                     jobject object,
+                                     jlong urlRequestAdapter) {
+  URLRequestAdapter* request =
+      reinterpret_cast<URLRequestAdapter*>(urlRequestAdapter);
+  if (request == NULL) {
+    return NULL;
+  }
+  std::string negotiated_protocol = request->GetNegotiatedProtocol();
+  return ConvertUTF8ToJavaString(env, negotiated_protocol.c_str()).Release();
+}
+
 }  // namespace cronet