Fix style on network details to put scrollbar in tab contents.

chrome/browser/resources/options2/chromeos/internet_detail.css

Index: chrome/browser/resources/options2/chromeos/internet_detail.css
diff --git a/chrome/browser/resources/options2/chromeos/internet_detail.css b/chrome/browser/resources/options2/chromeos/internet_detail.css
index fc51fb24aad77fbd31a48b599dbd5a0247663ab7..b01d36579cdfa2d4c35d4453dc72de3a00303cfb 100644
--- a/chrome/browser/resources/options2/chromeos/internet_detail.css
+++ b/chrome/browser/resources/options2/chromeos/internet_detail.css
@@ -4,6 +4,8 @@
 
 /* Force tab strip to extend to the left and right edges of the window. */
 #internet-details-content-area {
+  -webkit-box-orient: vertical;
+  display: -webkit-box;
   margin: 0 !important;
   padding: 0 !important;
 }
@@ -47,6 +49,8 @@
 /* Fix the height of the subpages so that the dialog does not resize when the
    user switches tabs. */
 #internet-details-content-area > .subpages-tab-contents {
+  -webkit-box-flex: 1;
+  -webkit-box-sizing: border-box;
   -webkit-padding-end: 10px;
   height: 350px;
   min-width: 480px;