Move document.visualViewport to window.visualViewport

third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp

Index: third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
diff --git a/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp b/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
index 0e6f2bc77983e0d1da1c0538800f884070a6489f..130fa525436b6c9a99074fab4f406eab4484d746 100644
--- a/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
+++ b/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
@@ -1031,6 +1031,18 @@ double LocalDOMWindow::scrollY() const
     return adjustScrollForAbsoluteZoom(viewportY, frame()->pageZoomFactor());
 }
 
+VisualViewport* LocalDOMWindow::visualViewport()
+{
+    if (!frame())
+        return nullptr;
+
+    FrameHost* host = frame()->host();
+    if (!host)
+        return nullptr;
+
+    return &host->visualViewport();
+}
+
 const AtomicString& LocalDOMWindow::name() const
 {
     if (!isCurrentlyDisplayedInFrame())