[MD settings] fix tooltips on policy icons

This CL changes the relative position for tooltips vs the trigger for
the tooltip so that the tooltip shows up reliably.

Bug: 774046
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I78f8fd6b95992a2c4e3f1a1d7b1ff43a969a4654
Reviewed-on: https://chromium-review.googlesource.com/719581
Reviewed-by: Steven Bennetts <[email protected]>
Commit-Queue: Dave Schuyler <[email protected]>
Cr-Original-Commit-Position: refs/heads/master@{#509188}(cherry picked from commit 5f88902)
Reviewed-on: https://chromium-review.googlesource.com/726400
Reviewed-by: Dave Schuyler <[email protected]>
Cr-Commit-Position: refs/branch-heads/3239@{#56}
Cr-Branched-From: adb61db-refs/heads/master@{#508578}

Author: dschuyler

chrome/browser/resources/settings/search_settings.js

@@ -213,7 +213,7 @@ cr.define('settings', function() {
     // Dynamically position the bubble at the edge the associated control
     // element.
     var updatePosition = function() {
-      searchBubble.style.top =
+      searchBubble.style.top = element.offsetTop +
           (innards.classList.contains('above') ? -searchBubble.offsetHeight :
                                                  element.offsetHeight) +
           'px';

ui/webui/resources/cr_elements/cr_link_row/cr_link_row.html

@@ -24,7 +24,6 @@
         min-height: var(--cr-section-min-height);
         outline: none;
         padding: 0 var(--cr-section-padding);
-        position: relative;
       }
 
       :host([disabled]) {

ui/webui/resources/cr_elements/shared_vars_css.html

@@ -65,7 +65,6 @@
       display: flex;
       min-height: var(--cr-section-min-height);
       padding: 0 var(--cr-section-padding);
-      position: relative;
     };
 
     --cr-title-text: {