Fix element visibility check for validation bubbles and SELECT popups.

third_party/WebKit/Source/core/dom/Element.cpp

Index: third_party/WebKit/Source/core/dom/Element.cpp
diff --git a/third_party/WebKit/Source/core/dom/Element.cpp b/third_party/WebKit/Source/core/dom/Element.cpp
index 8fb4a4d37b6c25f79605301a33d289ddf59be2d9..762203b3589bf0d7178082fb3ccb35f771b7ccde 100644
--- a/third_party/WebKit/Source/core/dom/Element.cpp
+++ b/third_party/WebKit/Source/core/dom/Element.cpp
@@ -95,6 +95,7 @@
 #include "core/frame/ScrollToOptions.h"
 #include "core/frame/Settings.h"
 #include "core/frame/UseCounter.h"
+#include "core/frame/VisualViewport.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/html/ClassList.h"
 #include "core/html/HTMLCanvasElement.h"
@@ -1015,6 +1016,20 @@ IntRect Element::boundsInViewport() const
     return view->contentsToViewport(result);
 }
 
+IntRect Element::visibleBoundsInViewport() const
+{
+    if (!layoutObject() || !document().page())
+        return IntRect();
+    // TODO(tkent): Can we check invisibility by scrollable non-frame elements?
+
+    IntSize viewportSize = document().page()->frameHost().visualViewport().size();
+    IntRect rect(0, 0, viewportSize.width(), viewportSize.height());
+    // We don't use absoluteBoundingBoxRect() because it can return an IntRect
+    // larger the actual size by 1px. crbug.com/470503
+    rect.intersect(document().view()->contentsToViewport(roundedIntRect(layoutObject()->absoluteBoundingBoxFloatRect())));
+    return rect;
+}
+
 ClientRectList* Element::getClientRects()
 {
     document().updateStyleAndLayoutIgnorePendingStylesheetsForNode(this);