Add Frame and RemoteFrame classes.

Source/core/frame/Frame.h

+// 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.
+
+#ifndef Frame_h
+#define Frame_h
+
+#include "wtf/Forward.h"
+#include "wtf/HashSet.h"
+#include "wtf/RefCounted.h"
+
+namespace blink {
+class WebLayer;
+}
+
+namespace WebCore {
+
+class Document;
+class DOMWindow;
+class ChromeClient;
+class FrameDestructionObserver;
+class FrameHost;
+class FrameLoaderClient;
+class HTMLFrameOwnerElement;
+class Page;
+class RenderView;
+class Settings;
+
+class FrameInit : public RefCounted<FrameInit> {
+public:
+    // For creating a dummy Frame
+    static PassRefPtr<FrameInit> create(FrameHost* host, FrameLoaderClient* client)
+    {
+        return adoptRef(new FrameInit(host, client));
+    }
+
+    void setFrameHost(FrameHost* host) { m_frameHost = host; }
+    FrameHost* frameHost() const { return m_frameHost; }
+
+    void setFrameLoaderClient(FrameLoaderClient* client) { m_client = client; }
+    FrameLoaderClient* frameLoaderClient() const { return m_client; }
+
+    void setOwnerElement(HTMLFrameOwnerElement* ownerElement) { m_ownerElement = ownerElement; }
+    HTMLFrameOwnerElement* ownerElement() const { return m_ownerElement; }
+
+protected:
+    FrameInit(FrameHost* host = 0, FrameLoaderClient* client = 0)
+        : m_client(client)
+        , m_frameHost(host)
+        , m_ownerElement(0)
+    {
+    }
+
+private:
+    FrameLoaderClient* m_client;
+    FrameHost* m_frameHost;
+    HTMLFrameOwnerElement* m_ownerElement;
+};
+
+class Frame : public RefCounted<Frame> {
+public:
+    virtual bool isLocalFrame() const { return false; }
+    virtual bool isRemoteFrame() const { return false; }
+
+    virtual ~Frame();
+
+    void addDestructionObserver(FrameDestructionObserver*);
+    void removeDestructionObserver(FrameDestructionObserver*);
+
+    virtual void willDetachFrameHost();
+    virtual void detachFromFrameHost();
+
+    // NOTE: Page is moving out of Blink up into the browser process as
+    // part of the site-isolation (out of process iframes) work.
+    // FrameHost should be used instead where possible.
+    Page* page() const;
+    FrameHost* host() const; // Null when the frame is detached.
+
+    bool isMainFrame() const;
+
+    virtual void setDOMWindow(PassRefPtr<DOMWindow>);
+    DOMWindow* domWindow() const;
+    Document* document() const;
+
+    ChromeClient& chromeClient() const;
+
+    RenderView* contentRenderer() const; // Root of the render tree for the document contained in this frame.
+
+    int64_t frameID() const { return m_frameID; }
+
+    // FIXME: These should move to RemoteFrame when that is instantiated.
+    void setRemotePlatformLayer(blink::WebLayer* remotePlatformLayer) { m_remotePlatformLayer = remotePlatformLayer; }
+    blink::WebLayer* remotePlatformLayer() const { return m_remotePlatformLayer; }
+
+// ======== All public functions below this point are candidates to move out of Frame into another class. ========
+
+    Settings* settings() const; // can be null
+
+    double devicePixelRatio() const;
+
+// ========
+
+protected:
+    Frame(PassRefPtr<FrameInit>);
+
+    RefPtr<FrameInit> m_frameInit;
+    FrameHost* m_host;
+
+    RefPtr<DOMWindow> m_domWindow;
+
+private:
+
+    HashSet<FrameDestructionObserver*> m_destructionObservers;
+
+    // Temporary hack for history.
+    int64_t m_frameID;
+
+    blink::WebLayer* m_remotePlatformLayer;
+};
+
+inline DOMWindow* Frame::domWindow() const
+{
+    return m_domWindow.get();
+}
+} // namespace WebCore
+
+#endif // Frame_h