Disallow connecting an insecure WebSocket from a secure page.

Source/modules/websockets/WebSocket.cpp

Index: Source/modules/websockets/WebSocket.cpp
diff --git a/Source/modules/websockets/WebSocket.cpp b/Source/modules/websockets/WebSocket.cpp
index 44e1300d8be7720ddca55493e7edd5c0731d1f5b..181bef490a520928be66f193529f36027dcbbc88 100644
--- a/Source/modules/websockets/WebSocket.cpp
+++ b/Source/modules/websockets/WebSocket.cpp
@@ -300,11 +300,7 @@ void WebSocket::connect(const String& url, const Vector<String>& protocols, Exce
         exceptionState.throwDOMException(SyntaxError, "The URL's scheme must be either 'ws' or 'wss'. '" + m_url.protocol() + "' is not allowed.");
         return;
     }
-    if (MixedContentChecker::isMixedContent(executionContext()->securityOrigin(), m_url)) {
-        // FIXME: Throw an exception and close the connection.
-        String message = "Connecting to a non-secure WebSocket server from a secure origin is deprecated.";
-        executionContext()->addConsoleMessage(JSMessageSource, WarningMessageLevel, message);
-    }
+
     if (m_url.hasFragmentIdentifier()) {
         m_state = CLOSED;
         exceptionState.throwDOMException(SyntaxError, "The URL contains a fragment identifier ('" + m_url.fragmentIdentifier() + "'). Fragment identifiers are not allowed in WebSocket URLs.");
@@ -360,7 +356,12 @@ void WebSocket::connect(const String& url, const Vector<String>& protocols, Exce
     if (!protocols.isEmpty())
         protocolString = joinStrings(protocols, subProtocolSeperator());
 
-    m_channel->connect(m_url, protocolString);
+    if (!m_channel->connect(m_url, protocolString)) {
+        m_state = CLOSED;
+        exceptionState.throwSecurityError("An insecure WebSocket connection may not be initiated from a page loaded over HTTPS.");
+        releaseChannel();
+        return;
+    }
 }
 
 void WebSocket::handleSendResult(WebSocketChannel::SendResult result, ExceptionState& exceptionState)