Add window access checks for Suborigins

Source/core/frame/LocalDOMWindow.cpp

Index: Source/core/frame/LocalDOMWindow.cpp
diff --git a/Source/core/frame/LocalDOMWindow.cpp b/Source/core/frame/LocalDOMWindow.cpp
index a33e48cf2e4b4aabda88b760a5fa6d12d067581d..83099d10baa2f2e018250e067860630f54b09992 100644
--- a/Source/core/frame/LocalDOMWindow.cpp
+++ b/Source/core/frame/LocalDOMWindow.cpp
@@ -687,7 +687,7 @@ void LocalDOMWindow::dispatchMessageEventWithOriginCheck(SecurityOrigin* intende
 {
     if (intendedTargetOrigin) {
         // Check target origin now since the target document may have changed since the timer was scheduled.
-        if (!intendedTargetOrigin->isSameSchemeHostPort(document()->securityOrigin())) {
+        if (!intendedTargetOrigin->isSameSchemeHostPortAndSuborigin(document()->securityOrigin())) {
             String message = ExceptionMessages::failedToExecute("postMessage", "DOMWindow", "The target origin provided ('" + intendedTargetOrigin->toString() + "') does not match the recipient window's origin ('" + document()->securityOrigin()->toString() + "').");
             RefPtrWillBeRawPtr<ConsoleMessage> consoleMessage = ConsoleMessage::create(SecurityMessageSource, ErrorMessageLevel, message);
             consoleMessage->setCallStack(stackTrace);