Make SecurityContext available in RemoteFrames.

Source/core/dom/RemoteSecurityContext.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/dom/RemoteSecurityContext.h"
+
+#include "core/frame/csp/ContentSecurityPolicy.h"
+#include "platform/weborigin/SecurityOrigin.h"
+
+namespace blink {
+
+RemoteSecurityContext::RemoteSecurityContext()
+    : SecurityContext()
+{
+}
+
+PassRefPtr<RemoteSecurityContext> RemoteSecurityContext::create()
+{
+    RefPtr<RemoteSecurityContext> securityContext =
+        adoptRef(new RemoteSecurityContext());
+
+    // RemoteSecurityContext's origin is expected to stay uninitialized until
+    // we set it using replicated origin data from the browser process.
+    ASSERT(!securityContext->haveInitializedSecurityOrigin());
+
+    // CSP will not be replicated for RemoteSecurityContexts, as it is moving
+    // to the browser process.  For now, initialize CSP to a default
+    // locked-down policy.
+    securityContext->setContentSecurityPolicy(ContentSecurityPolicy::create());

[dcheng, 2014/11/18 23:31:40]

I'd probably move lines 23-30 to the constructor as well. The general pattern is
for create() to just be a very thin wrapper around the actual class constructor.

[alexmos, 2014/11/19 00:33:04]

Done.

+
+    // TODO(alexmos): Document::initSecurityContext has a few other things we
+    // may eventually want here, such as enforcing a setting to
+    // grantUniversalAccess().
+
+    return securityContext.release();
+}
+
+void RemoteSecurityContext::setReplicatedOrigin(PassRefPtr<SecurityOrigin> origin)
+{
+    // FIXME(alexmos): currently, replicated security origins are passed only
+    // at RemoteFrame creation time.  Eventually, this class will also need to
+    // handle origin updates to handle cases like setting document.domain, but
+    // for now, check that this is the first and only time we are setting the
+    // origin.
+    ASSERT(!haveInitializedSecurityOrigin());
+    setSecurityOrigin(origin);
+}
+
+
+} // namespace blink