Reverting changes that made window.scroll properties relative to the layout viewport.

third_party/WebKit/Source/web/WebSettingsImpl.cpp

Index: third_party/WebKit/Source/web/WebSettingsImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebSettingsImpl.cpp b/third_party/WebKit/Source/web/WebSettingsImpl.cpp
index 9259522e70db182efa19d78ae16c34f9756f6663..d2eb8d2becd34bf8f1a6ad4785ccff373163de97 100644
--- a/third_party/WebKit/Source/web/WebSettingsImpl.cpp
+++ b/third_party/WebKit/Source/web/WebSettingsImpl.cpp
@@ -184,6 +184,11 @@ void WebSettingsImpl::setInlineTextBoxAccessibilityEnabled(bool enabled)
     m_settings->setInlineTextBoxAccessibilityEnabled(enabled);
 }
 
+void WebSettingsImpl::setInertVisualViewport(bool enabled)
+{
+    m_settings->setInertVisualViewport(enabled);
+}
+
 void WebSettingsImpl::setDeviceScaleAdjustment(float deviceScaleAdjustment)
 {
     m_devToolsEmulator->setDeviceScaleAdjustment(deviceScaleAdjustment);