Slightly increase the size of the CBD dialog body to hint at scrolling

chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html

Index: chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html
diff --git a/chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html b/chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html
index 4bf0b9a93a51c2ff32f7353856135298934e1646..56465f1aabe345190ae98e48c2bcfaeae2b17385 100644
--- a/chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html
+++ b/chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.html
@@ -99,10 +99,11 @@
       /* Cap the height on smaller screens to avoid unfavorable clipping.
        * Replace the bottom margin with padding to avoid the gap between
        * the scrollbar and the bottom separator. */
-      @media all and (max-height: 714px) {
+      @media all and (max-height: 724px) {
         #dialog .body {
           margin-bottom: 0;
-          max-height: 270px;
+          /* crbug.com/652027: Show four and a *half* items in the list. */
+          max-height: 280px;

[Dan Beam, 2016/10/11 17:35:03]

could this be expressed as calc(4.5 * var(--some-variable))?

also, does this work for all cases (i.e. if I uncheck some of these
<settings-checkbox>es, they shorten, right?)

           overflow-y: scroll;
           padding-bottom: 12px;
         }