[memory-inspector] Fix zygote wrapper script and UI scrolling

tools/memory_inspector/memory_inspector/frontends/www_content/js/rootUi.js

Index: tools/memory_inspector/memory_inspector/frontends/www_content/js/rootUi.js
diff --git a/tools/memory_inspector/memory_inspector/frontends/www_content/js/rootUi.js b/tools/memory_inspector/memory_inspector/frontends/www_content/js/rootUi.js
index bb4c80e7f0632983488535b0d24f4681129ae2ba..8e29546a926da4af2250b49a37b57f5bbdda27aa 100644
--- a/tools/memory_inspector/memory_inspector/frontends/www_content/js/rootUi.js
+++ b/tools/memory_inspector/memory_inspector/frontends/www_content/js/rootUi.js
@@ -4,6 +4,8 @@
 
 rootUi = new (function() {
 
+this.savedScrollTop_ = 0;
+
 this.onDomReady_ = function() {
   $('#js_loading_banner').hide();
   $('#tabs').tabs({activate: this.onTabChange_.bind(this)});
@@ -84,6 +86,15 @@ this.onServerUnreachableOrTimeout = function() {
                   'It probably crashed, Check the terminal output.');
 };
 
+// Sad hack required to work around a Google Table bug (goo.gl/TXr3vL).
+this.saveScrollPosition = function() {
+  this.savedScrollTop_ = $('#wrapper').scrollTop();
+};
+
+this.restoreScrollPosition = function() {
+  $('#wrapper').scrollTop(this.savedScrollTop_);
+};
+
 $(document).ready(this.onDomReady_.bind(this));
 
 })();