Implement 'window.isSecureContext'.

third_party/WebKit/Source/core/frame/DOMWindow.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/frame/DOMWindow.h"
 
 #include "bindings/core/v8/ScriptCallStackFactory.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
+#include "core/dom/ExecutionContext.h"
 #include "core/dom/SecurityContext.h"
 #include "core/events/MessageEvent.h"
 #include "core/frame/Frame.h"
 #include "core/frame/FrameClient.h"
 #include "core/frame/FrameConsole.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/Location.h"
 #include "core/frame/Settings.h"
 #include "core/frame/UseCounter.h"
 #include "core/inspector/ConsoleMessageStorage.h"
@@ skipping 127 matching lines @@
 void DOMWindow::resetLocation()
 {
     // Location needs to be reset manually because it doesn't inherit from DOMWindowProperty.
     // DOMWindowProperty is local-only, and Location needs to support remote windows, too.
     if (m_location) {
         m_location->reset();
         m_location = nullptr;
     }
 }
 
+bool DOMWindow::isSecureContext() const
+{
+    if (!frame())
+        return false;
+
+    String unusedErrorMessage;
+    return document()->isSecureContext(unusedErrorMessage, ExecutionContext::StandardSecureContextCheck);
+}
+
 void DOMWindow::postMessage(PassRefPtr<SerializedScriptValue> message, const MessagePortArray* ports, const String& targetOrigin, LocalDOMWindow* source, ExceptionState& exceptionState)
 {
     if (!isCurrentlyDisplayedInFrame())
         return;
 
     Document* sourceDocument = source->document();
 
     // Compute the target origin.  We need to do this synchronously in order
     // to generate the SyntaxError exception correctly.
     RefPtr<SecurityOrigin> target;
@@ skipping 160 matching lines @@
     m_windowIsClosing = true;
 }
 
 DEFINE_TRACE(DOMWindow)
 {
     visitor->trace(m_location);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace blink