Add initial Screen Orientation API support: IDL changes

Source/modules/screen_orientation/ScreenOrientation.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 "ScreenOrientation.h"

[abarth-chromium, 2014/02/16 09:14:11]

Please use paths relative to Source when including files.

[Inactive, 2014/02/16 14:09:14]

Done.

+
+#include "core/frame/DOMWindow.h"
+#include "core/frame/Frame.h"
+#include "core/frame/Screen.h"
+
+namespace WebCore {
+
+ScreenOrientation::ScreenOrientation(Screen* screen)
+    : DOMWindowProperty(screen->frame())
+{
+}
+
+const char* ScreenOrientation::supplementName()
+{
+    return "ScreenOrientation";
+}
+
+ScreenOrientation* ScreenOrientation::from(Screen* screen)
+{
+    ScreenOrientation* supplement = static_cast<ScreenOrientation*>(Supplement<Screen>::from(screen, supplementName()));
+    if (!supplement) {
+        ASSERT(screen);
+        supplement = new ScreenOrientation(screen);
+        provideTo(screen, supplementName(), adoptPtr(supplement));
+    }
+    return supplement;
+}
+
+ScreenOrientation::~ScreenOrientation()
+{
+}
+
+Screen* ScreenOrientation::screen() const
+{
+    Frame* frame = this->frame();
+    ASSERT(frame);

[abarth-chromium, 2014/02/16 09:14:11]

It's possible for frame to be zero here, but it's fine to make that an error. 
We just need to be careful when calling this function.

+    DOMWindow* window = frame->domWindow();
+    ASSERT(window);
+    return window->screen();
+}
+
+const AtomicString& ScreenOrientation::orientation(Screen* screen)
+{
+    // FIXME: Implement.
+    DEFINE_STATIC_LOCAL(const AtomicString, portraitPrimary, ("portrait-primary", AtomicString::ConstructFromLiteral));
+    return portraitPrimary;
+}
+
+bool ScreenOrientation::lockOrientation(Screen* screen, const Vector<String>& orientations)
+{
+    // FIXME: Implement.
+    return false;
+}
+
+bool ScreenOrientation::lockOrientation(Screen* screen, const AtomicString& orientation)
+{
+    // FIXME: Implement.
+    return false;
+}
+
+void ScreenOrientation::unlockOrientation(Screen* screen)
+{
+    // FIXME: Implement.
+}
+
+} // namespace WebCore