Add pixel readback to page popup

Source/web/WebPagePopupImpl.cpp

 /*
  * Copyright (C) 2012 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 26 matching lines @@
 #include "core/frame/Settings.h"
 #include "core/loader/EmptyClients.h"
 #include "core/loader/FrameLoadRequest.h"
 #include "core/page/Chrome.h"
 #include "core/page/DOMWindowPagePopup.h"
 #include "core/page/EventHandler.h"
 #include "core/page/FocusController.h"
 #include "core/page/Page.h"
 #include "core/page/PagePopupClient.h"
 #include "platform/TraceEvent.h"
+#include "public/platform/WebCompositeAndReadbackAsyncCallback.h"
 #include "public/platform/WebCursorInfo.h"
 #include "public/web/WebViewClient.h"
 #include "public/web/WebWidgetClient.h"
 #include "web/WebInputEventConversion.h"
 #include "web/WebSettingsImpl.h"
 #include "web/WebViewImpl.h"
 
 namespace blink {
 
 class PagePopupChromeClient : public EmptyChromeClient {
@@ skipping 328 matching lines @@
 
     // m_widgetClient might be 0 because this widget might be already closed.
     if (m_widgetClient) {
         // closeWidgetSoon() will call this->close() later.
         m_widgetClient->closeWidgetSoon();
     }
 
     m_popupClient->didClosePopup();
 }
 
+void WebPagePopupImpl::compositeAndReadbackAsync(WebCompositeAndReadbackAsyncCallback* callback)
+{
+    ASSERT(isAcceleratedCompositingActive());
+    callback->setIsPopup(true);
+    callback->setReadbackPosition(WebPoint(m_windowRectInScreen.x, m_windowRectInScreen.y));
+    m_layerTreeView->compositeAndReadbackAsync(callback);
+}
+
+LocalDOMWindow* WebPagePopupImpl::window()
+{
+    return m_page->mainFrame()->domWindow();
+}
+
+WebPoint WebPagePopupImpl::relativePosition()
+{
+    WebRect windowRect = m_webView->client()->rootWindowRect();
+    return WebPoint(m_windowRectInScreen.x - windowRect.x, m_windowRectInScreen.y - windowRect.y);
+}
+
 // WebPagePopup ----------------------------------------------------------------
 
 WebPagePopup* WebPagePopup::create(WebWidgetClient* client)
 {
     if (!client)
         CRASH();
     // A WebPagePopupImpl instance usually has two references.
     //  - One owned by the instance itself. It represents the visible widget.
     //  - One owned by a WebViewImpl. It's released when the WebViewImpl ask the
     //    WebPagePopupImpl to close.
     // We need them because the closing operation is asynchronous and the widget
     // can be closed while the WebViewImpl is unaware of it.
     return adoptRef(new WebPagePopupImpl(client)).leakRef();
 }
 
 } // namespace blink