diff --git a/core/inject.js b/core/inject.js
index 46289275ec2..312bfbb537f 100644
--- a/core/inject.js
+++ b/core/inject.js
@@ -34,7 +34,6 @@ goog.require('Blockly.utils');
 goog.require('Blockly.WorkspaceSvg');
 goog.require('Blockly.WorkspaceDragSurfaceSvg');
 
-goog.require('goog.dom');
 goog.require('goog.ui.Component');
 goog.require('goog.userAgent');
 
@@ -54,7 +53,7 @@ Blockly.inject = function(container, opt_options) {
         document.querySelector(container);
   }
   // Verify that the container is in document.
-  if (!goog.dom.contains(document, container)) {
+  if (!Blockly.utils.containsNode(document, container)) {
     throw Error('Error: container is not in current document.');
   }
   var options = new Blockly.Options(opt_options || {});
diff --git a/core/toolbox.js b/core/toolbox.js
index 6546d4a060d..e25f17d8407 100644
--- a/core/toolbox.js
+++ b/core/toolbox.js
@@ -33,7 +33,6 @@ goog.require('Blockly.Touch');
 goog.require('Blockly.utils');
 goog.require('Blockly.VerticalFlyout');
 
-goog.require('goog.dom');
 goog.require('goog.events');
 goog.require('goog.events.BrowserFeature');
 goog.require('goog.html.SafeHtml');
@@ -191,8 +190,10 @@ Blockly.Toolbox.prototype.init = function() {
   } else {
     this.flyout_ = new Blockly.VerticalFlyout(workspaceOptions);
   }
-  goog.dom.insertSiblingAfter(
-      this.flyout_.createDom('svg'), this.workspace_.getParentSvg());
+  // Insert the flyout after the workspace.
+  var workspaceSvg = this.workspace_.getParentSvg();
+  workspaceSvg.parentNode.insertBefore(this.flyout_.createDom('svg'),
+      workspaceSvg.nextSibling);
   this.flyout_.init(workspace);
 
   this.config_['cleardotPath'] = workspace.options.pathToMedia + '1x1.gif';
diff --git a/core/utils.js b/core/utils.js
index cd0e9881800..f28f0fcb722 100644
--- a/core/utils.js
+++ b/core/utils.js
@@ -946,3 +946,14 @@ Blockly.utils.toRadians = function(angleDegrees) {
 Blockly.utils.toDegrees = function(angleRadians) {
   return angleRadians * 180 / Math.PI;
 };
+
+/**
+ * Whether a node contains another node.
+ * @param {!Node} parent The node that should contain the other node.
+ * @param {!Node} descendant The node to test presence of.
+ * @return {boolean} Whether the parent node contains the descendant node.
+ */
+Blockly.utils.containsNode = function(parent, descendant) {
+  return !!(parent.compareDocumentPosition(descendant) &
+            Node.DOCUMENT_POSITION_CONTAINED_BY);
+};
diff --git a/core/workspace_comment_svg.js b/core/workspace_comment_svg.js
index 9205ad350de..6f5e8ea0d2e 100644
--- a/core/workspace_comment_svg.js
+++ b/core/workspace_comment_svg.js
@@ -32,7 +32,6 @@ goog.require('Blockly.Events.CommentMove');
 goog.require('Blockly.utils');
 goog.require('Blockly.WorkspaceComment');
 
-goog.require('goog.dom');
 goog.require('goog.math.Coordinate');
 
 
diff --git a/core/workspace_svg.js b/core/workspace_svg.js
index cd9e51dff31..7f4d2a5eb29 100644
--- a/core/workspace_svg.js
+++ b/core/workspace_svg.js
@@ -346,8 +346,8 @@ Blockly.WorkspaceSvg.prototype.getSvgXY = function(element) {
   var x = 0;
   var y = 0;
   var scale = 1;
-  if (goog.dom.contains(this.getCanvas(), element) ||
-      goog.dom.contains(this.getBubbleCanvas(), element)) {
+  if (Blockly.utils.containsNode(this.getCanvas(), element) ||
+      Blockly.utils.containsNode(this.getBubbleCanvas(), element)) {
     // Before the SVG canvas, scale the coordinates.
     scale = this.scale;
   }
@@ -539,7 +539,10 @@ Blockly.WorkspaceSvg.prototype.dispose = function() {
   if (!this.options.parentWorkspace) {
     // Top-most workspace.  Dispose of the div that the
     // SVG is injected into (i.e. injectionDiv).
-    goog.dom.removeNode(this.getParentSvg().parentNode);
+    var div = this.getParentSvg().parentNode;
+    if (div) {
+      div.parentNode.removeChild(div);
+    }
   }
   if (this.resizeHandlerWrapper_) {
     Blockly.unbindEvent_(this.resizeHandlerWrapper_);