Add pixel readback to page popup

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index fe75efa439e4122e361ec150254cbce64f7698ea..d8e8d7a2ecf54953d6fc4b5f037bd5600b97da8a 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -113,6 +113,7 @@
 #include "platform/scroll/ScrollbarTheme.h"
 #include "platform/weborigin/SchemeRegistry.h"
 #include "public/platform/Platform.h"
+#include "public/platform/WebCompositeAndReadbackAsyncCallback.h"
 #include "public/platform/WebDragData.h"
 #include "public/platform/WebFloatPoint.h"
 #include "public/platform/WebGestureCurve.h"
@@ -1561,6 +1562,11 @@ void WebViewImpl::closePagePopup(PagePopup* popup)
     m_pagePopup = nullptr;
 }
 
+LocalDOMWindow* WebViewImpl::pagePopupWindow()
+{
+    return m_pagePopup ? m_pagePopup->window() : nullptr;
+}
+
 Frame* WebViewImpl::focusedCoreFrame() const
 {
     return m_page ? m_page->focusController().focusedOrMainFrame() : 0;
@@ -2483,6 +2489,11 @@ WebColor WebViewImpl::backgroundColor() const
     return view->documentBackgroundColor().rgb();
 }
 
+WebPagePopup* WebViewImpl::popup() const
+{
+    return m_pagePopup.get();
+}
+
 bool WebViewImpl::caretOrSelectionRange(size_t* location, size_t* length)
 {
     const LocalFrame* focused = toLocalFrame(focusedCoreFrame());