Generalize browser controls adjustment for arbitrary scrollers.

third_party/WebKit/Source/web/WebViewImpl.cpp

Index: third_party/WebKit/Source/web/WebViewImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebViewImpl.cpp b/third_party/WebKit/Source/web/WebViewImpl.cpp
index 113edd6642cab177ad56db78ba5a7a78c31a9432..7d3c47cde10a4c24e4684c3f94a0fa24f7042cb6 100644
--- a/third_party/WebKit/Source/web/WebViewImpl.cpp
+++ b/third_party/WebKit/Source/web/WebViewImpl.cpp
@@ -1846,11 +1846,6 @@ void WebViewImpl::didUpdateBrowserControls() {
         browserControls().layoutHeight() - browserControls().contentOffset();
     visualViewport.setBrowserControlsAdjustment(
         browserControlsViewportAdjustment);
-
-    // Since the FrameView is sized to be the visual viewport at minimum
-    // scale, its adjustment must also be scaled by the minimum scale.
-    view->setBrowserControlsViewportAdjustment(
-        browserControlsViewportAdjustment / minimumPageScaleFactor());
   }
 }