Use compositor with select popups.

Source/web/WebPopupMenuImpl.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebPopupMenuImpl_h
 #define WebPopupMenuImpl_h
 
 #include "WebPopupMenu.h"
 #include "platform/scroll/FramelessScrollViewClient.h"
+#include "public/platform/WebContentLayerClient.h"
 #include "public/platform/WebPoint.h"
 #include "public/platform/WebSize.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 class Frame;
 class FramelessScrollView;
 class KeyboardEvent;
 class Page;
 class PlatformKeyboardEvent;
 class Range;
 class Widget;
 }
 
 namespace blink {
+class WebContentLayer;
 class WebGestureEvent;
 class WebKeyboardEvent;
+class WebLayerTreeView;
 class WebMouseEvent;
 class WebMouseWheelEvent;
 class WebRange;
 struct WebRect;
 class WebTouchEvent;
 
-class WebPopupMenuImpl : public WebPopupMenu,
-                         public WebCore::FramelessScrollViewClient,
-                         public RefCounted<WebPopupMenuImpl> {
+class WebPopupMenuImpl : public WebPopupMenu
+    , public WebCore::FramelessScrollViewClient

[jamesr, 2014/01/21 21:59:23]

this formatting is very funky - I don't think we do the leading comma thing for
subclasses in blink, just for initializers in constructors

+    , public WebContentLayerClient
+    , public RefCounted<WebPopupMenuImpl> {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     // WebWidget functions:
     virtual void close() OVERRIDE;
     virtual WebSize size() OVERRIDE { return m_size; }
     virtual void willStartLiveResize() OVERRIDE;
     virtual void resize(const WebSize&) OVERRIDE;
     virtual void willEndLiveResize() OVERRIDE;
     virtual void animate(double frameBeginTime) OVERRIDE;
     virtual void layout() OVERRIDE;
+    virtual void enterForceCompositingMode(bool enable) OVERRIDE;
+    virtual void didExitCompositingMode() OVERRIDE;
     virtual void paint(WebCanvas*, const WebRect&, PaintOptions = ReadbackFromCompositorIfAvailable) OVERRIDE;
     virtual void themeChanged() OVERRIDE;
     virtual bool handleInputEvent(const WebInputEvent&) OVERRIDE;
     virtual void mouseCaptureLost() OVERRIDE;
     virtual void setFocus(bool enable) OVERRIDE;
     virtual bool setComposition(
         const WebString& text,
         const WebVector<WebCompositionUnderline>& underlines,
         int selectionStart, int selectionEnd) OVERRIDE;
     virtual bool confirmComposition() OVERRIDE;
     virtual bool confirmComposition(ConfirmCompositionBehavior selectionBehavior) OVERRIDE;
     virtual bool confirmComposition(const WebString& text) OVERRIDE;
     virtual bool compositionRange(size_t* location, size_t* length) OVERRIDE;
     virtual bool caretOrSelectionRange(size_t* location, size_t* length) OVERRIDE;
     virtual void setTextDirection(WebTextDirection) OVERRIDE;
     virtual bool isAcceleratedCompositingActive() const OVERRIDE { return false; }
     virtual bool isPopupMenu() const OVERRIDE { return true; }
+    virtual void willCloseLayerTreeView() OVERRIDE;
+
+    // WebContentLayerClient
+    virtual void paintContents(WebCanvas*, const WebRect& clip, bool canPaintLCDTest, WebFloatRect& opaque) OVERRIDE;
 
     // WebPopupMenuImpl
     void initialize(WebCore::FramelessScrollView* widget, const WebRect& bounds);
 
     WebWidgetClient* client() { return m_client; }
 
     void handleMouseMove(const WebMouseEvent&);
     void handleMouseLeave(const WebMouseEvent&);
     void handleMouseDown(const WebMouseEvent&);
     void handleMouseUp(const WebMouseEvent&);
@@ skipping 20 matching lines @@
     virtual WebCore::IntPoint screenToRootView(const WebCore::IntPoint&) const OVERRIDE;
     virtual WebCore::IntRect rootViewToScreen(const WebCore::IntRect&) const OVERRIDE;
     virtual WebScreenInfo screenInfo() const OVERRIDE;
 
     // WebCore::FramelessScrollViewClient methods:
     virtual void popupClosed(WebCore::FramelessScrollView*) OVERRIDE;
 
     WebWidgetClient* m_client;
     WebSize m_size;
 
+    WebLayerTreeView* m_layerTreeView;
+    OwnPtr<WebContentLayer> m_rootLayer;
+    bool m_isAcceleratedCompositingActive;
+
     WebPoint m_lastMousePosition;
 
     // This is a non-owning ref. The popup will notify us via popupClosed()
     // before it is destroyed.
     WebCore::FramelessScrollView* m_widget;
 };
 
 DEFINE_TYPE_CASTS(WebPopupMenuImpl, WebWidget, widget, widget->isPopupMenu(), widget.isPopupMenu());
 // WebPopupMenuImpl is the only implementation of FramelessScrollViewClient, so
 // no need for further checking.
 DEFINE_TYPE_CASTS(WebPopupMenuImpl, WebCore::FramelessScrollViewClient, client, true, true);
 
 } // namespace blink
 
 #endif