Add pixel readback to page popup

Source/web/WebViewImpl.h

Index: Source/web/WebViewImpl.h
diff --git a/Source/web/WebViewImpl.h b/Source/web/WebViewImpl.h
index 0db68d6ecdc61129878687dbed3b7c28e71490eb..c76a202f5790be8ec26d44d8d0bb5cdd3824c0bd 100644
--- a/Source/web/WebViewImpl.h
+++ b/Source/web/WebViewImpl.h
@@ -124,6 +124,7 @@ public:
     virtual bool compositionRange(size_t* location, size_t* length) OVERRIDE;
     virtual WebTextInputInfo textInputInfo() OVERRIDE;
     virtual WebColor backgroundColor() const OVERRIDE;
+    virtual WebPagePopup* popup() const OVERRIDE;
     virtual bool selectionBounds(WebRect& anchor, WebRect& focus) const OVERRIDE;
     virtual void didShowCandidateWindow() OVERRIDE;
     virtual void didUpdateCandidateWindow() OVERRIDE;
@@ -397,6 +398,7 @@ public:
     // PagePopupDriver functions.
     virtual PagePopup* openPagePopup(PagePopupClient*, const IntRect& originBoundsInRootView) OVERRIDE;
     virtual void closePagePopup(PagePopup*) OVERRIDE;
+    virtual LocalDOMWindow* pagePopupWindow() OVERRIDE;
 
     // Returns the input event we're currently processing. This is used in some
     // cases where the WebCore DOM event doesn't have the information we need.