MD Settings: Workaround for section expand/collapse animation jank.

chrome/browser/resources/settings/settings_page/main_page_behavior.js

Index: chrome/browser/resources/settings/settings_page/main_page_behavior.js
diff --git a/chrome/browser/resources/settings/settings_page/main_page_behavior.js b/chrome/browser/resources/settings/settings_page/main_page_behavior.js
index 40ae26314a4eaff26c424edffea3472ced143d19..f1760c340f48d263b99b3c668c49c5165b03eab8 100644
--- a/chrome/browser/resources/settings/settings_page/main_page_behavior.js
+++ b/chrome/browser/resources/settings/settings_page/main_page_behavior.js
@@ -360,7 +360,10 @@ var RoutableBehaviorImpl = {
         return;
       }
 
-      element.scrollIntoView();
+      // TODO(michaelpg): due to the workaround for crbug.com/617827 in
+      // settings_page_css.html, we have to use element.offsetTop instead of
+      // relying on element.scrollIntoView() so the margin is included.
+      host.scroller.scrollTop = element.offsetTop;
     }.bind(this));
   },