| Index: third_party/WebKit/Source/core/frame/FrameView.cpp | 
| diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp | 
| index 5a001ab09d6f290385e56e6a1218992a7d608fde..f9f7733d59b098d10d0e25a995264050d3b88a97 100644 | 
| --- a/third_party/WebKit/Source/core/frame/FrameView.cpp | 
| +++ b/third_party/WebKit/Source/core/frame/FrameView.cpp | 
| @@ -3734,6 +3734,11 @@ IntRect FrameView::contentsToScreen(const IntRect& rect) const | 
| return window->viewportToScreen(contentsToViewport(rect), this); | 
| } | 
|  | 
| +float FrameView::viewportToWindowScale() const | 
| +{ | 
| +    return 1.f / getHostWindow()->windowToViewportScalar(1.f); | 
| +} | 
| + | 
| IntRect FrameView::soonToBeRemovedContentsToUnscaledViewport(const IntRect& rectInContents) const | 
| { | 
| IntRect rectInFrame = contentsToFrame(rectInContents); | 
|  |