diff --git a/core/block.js b/core/block.js
index 36fb5ac28..38709e781 100644
--- a/core/block.js
+++ b/core/block.js
@@ -36,10 +36,11 @@ goog.require('Blockly.Events.BlockMove');
 goog.require('Blockly.Extensions');
 goog.require('Blockly.Input');
 goog.require('Blockly.Mutator');
+goog.require('Blockly.utils');
 goog.require('Blockly.Warning');
 goog.require('Blockly.Workspace');
 goog.require('Blockly.Xml');
-goog.require('goog.array');
+
 goog.require('goog.math.Coordinate');
 
 
@@ -496,7 +497,7 @@ Blockly.Block.prototype.setParent = function(newParent) {
   }
   if (this.parentBlock_) {
     // Remove this block from the old parent's child list.
-    goog.array.remove(this.parentBlock_.childBlocks_, this);
+    Blockly.utils.arrayRemove(this.parentBlock_.childBlocks_, this);
 
     // Disconnect from superior blocks.
     if (this.previousConnection && this.previousConnection.isConnected()) {
@@ -1444,7 +1445,7 @@ Blockly.Block.prototype.removeInput = function(name, opt_quiet) {
     }
   }
   if (!opt_quiet) {
-    throw ReferenceErrer('Input not found: ' + name);
+    throw ReferenceError('Input not found: ' + name);
   }
 };
 
diff --git a/core/block_events.js b/core/block_events.js
index 2bc6d6b23..b3a25be6f 100644
--- a/core/block_events.js
+++ b/core/block_events.js
@@ -37,7 +37,6 @@ goog.provide('Blockly.Events.Move');  // Deprecated.
 goog.require('Blockly.Events');
 goog.require('Blockly.Events.Abstract');
 
-goog.require('goog.array');
 goog.require('goog.math.Coordinate');
 
 
diff --git a/core/block_svg.js b/core/block_svg.js
index b26396945..fbf9ea947 100644
--- a/core/block_svg.js
+++ b/core/block_svg.js
@@ -37,6 +37,7 @@ goog.require('Blockly.Tooltip');
 goog.require('Blockly.Touch');
 goog.require('Blockly.utils');
 
+goog.require('goog.color');
 goog.require('goog.dom');
 goog.require('goog.math.Coordinate');
 
diff --git a/core/connection.js b/core/connection.js
index 23dbdb6cb..d6988c55e 100644
--- a/core/connection.js
+++ b/core/connection.js
@@ -654,9 +654,13 @@ Blockly.Connection.prototype.toString = function() {
   } else if (block.nextConnection == this) {
     msg = 'Next Connection of ';
   } else {
-    var parentInput = goog.array.find(block.inputList, function(input) {
-      return input.connection == this;
-    }, this);
+    var parentInput = null;
+    for (var i = 0, input; input = block.inputList[i]; i++) {
+      if (input.connection == this) {
+        parentInput = input;
+        break;
+      }
+    }
     if (parentInput) {
       msg = 'Input "' + parentInput.name + '" connection on ';
     } else {
diff --git a/core/events.js b/core/events.js
index b57d8c0e5..da4cbd3c7 100644
--- a/core/events.js
+++ b/core/events.js
@@ -30,7 +30,6 @@
  */
 goog.provide('Blockly.Events');
 
-goog.require('goog.array');
 goog.require('goog.math.Coordinate');
 
 
@@ -193,7 +192,7 @@ Blockly.Events.fireNow_ = function() {
  * @return {!Array.<!Blockly.Events.Abstract>} Array of filtered events.
  */
 Blockly.Events.filter = function(queueIn, forward) {
-  var queue = goog.array.clone(queueIn);
+  var queue = queueIn.slice();  // Shallow copy of queue.
   if (!forward) {
     // Undo is merged in reverse order.
     queue.reverse();
diff --git a/core/events_abstract.js b/core/events_abstract.js
index 17eea76d1..156353137 100644
--- a/core/events_abstract.js
+++ b/core/events_abstract.js
@@ -28,8 +28,6 @@
 goog.provide('Blockly.Events.Abstract');
 
 goog.require('Blockly.Events');
-goog.require('goog.array');
-goog.require('goog.math.Coordinate');
 
 /**
  * Abstract class for an event.
diff --git a/core/ui_events.js b/core/ui_events.js
index 2430ac928..d3ec6d6da 100644
--- a/core/ui_events.js
+++ b/core/ui_events.js
@@ -29,8 +29,6 @@ goog.provide('Blockly.Events.Ui');
 goog.require('Blockly.Events');
 goog.require('Blockly.Events.Abstract');
 
-goog.require('goog.array');
-goog.require('goog.math.Coordinate');
 
 /**
  * Class for a UI event.
diff --git a/core/utils.js b/core/utils.js
index 478c07228..9fc42a912 100644
--- a/core/utils.js
+++ b/core/utils.js
@@ -912,3 +912,19 @@ Blockly.utils.getViewportBBox = function() {
 Blockly.utils.startsWith = function(str, prefix) {
   return str.lastIndexOf(prefix, 0) == 0;
 };
+
+/**
+ * Removes the first occurrence of a particular value from an array.
+ * @param {!Array} arr Array from which to remove
+ *     value.
+ * @param {*} obj Object to remove.
+ * @return {boolean} True if an element was removed.
+ */
+Blockly.utils.arrayRemove = function(arr, obj) {
+  var i = arr.indexOf(obj);
+  if (i == -1) {
+    return false;
+  }
+  arr.splice(i, 1);
+  return true;
+};
diff --git a/core/variable_events.js b/core/variable_events.js
index 8691dbb0f..b9b40c84c 100644
--- a/core/variable_events.js
+++ b/core/variable_events.js
@@ -32,9 +32,6 @@ goog.provide('Blockly.Events.VarRename');
 goog.require('Blockly.Events');
 goog.require('Blockly.Events.Abstract');
 
-goog.require('goog.array');
-goog.require('goog.math.Coordinate');
-
 
 /**
  * Abstract class for a variable event.
diff --git a/core/workspace.js b/core/workspace.js
index 04952a189..90a3cd3d5 100644
--- a/core/workspace.js
+++ b/core/workspace.js
@@ -26,9 +26,10 @@
 
 goog.provide('Blockly.Workspace');
 
+goog.require('Blockly.utils');
 goog.require('Blockly.VariableMap');
 goog.require('Blockly.WorkspaceComment');
-goog.require('goog.array');
+
 goog.require('goog.math');
 
 
@@ -160,7 +161,7 @@ Blockly.Workspace.prototype.addTopBlock = function(block) {
  * @param {!Blockly.Block} block Block to remove.
  */
 Blockly.Workspace.prototype.removeTopBlock = function(block) {
-  if (!goog.array.remove(this.topBlocks_, block)) {
+  if (!Blockly.utils.arrayRemove(this.topBlocks_, block)) {
     throw Error('Block not present in workspace\'s list of top-most blocks.');
   }
 };
@@ -211,7 +212,7 @@ Blockly.Workspace.prototype.addTopComment = function(comment) {
  * @package
  */
 Blockly.Workspace.prototype.removeTopComment = function(comment) {
-  if (!goog.array.remove(this.topComments_, comment)) {
+  if (!Blockly.utils.arrayRemove(this.topComments_, comment)) {
     throw Error('Comment not present in workspace\'s list of top-most ' +
                 'comments.');
   }
@@ -511,7 +512,7 @@ Blockly.Workspace.prototype.addChangeListener = function(func) {
  * @param {Function} func Function to stop calling.
  */
 Blockly.Workspace.prototype.removeChangeListener = function(func) {
-  goog.array.remove(this.listeners_, func);
+  Blockly.utils.arrayRemove(this.listeners_, func);
 };
 
 /**
diff --git a/core/workspace_svg.js b/core/workspace_svg.js
index 56e1516ac..ac1d00707 100644
--- a/core/workspace_svg.js
+++ b/core/workspace_svg.js
@@ -38,6 +38,7 @@ goog.require('Blockly.ScrollbarPair');
 goog.require('Blockly.Touch');
 goog.require('Blockly.TouchGesture');
 goog.require('Blockly.Trashcan');
+goog.require('Blockly.utils');
 goog.require('Blockly.VariablesDynamic');
 goog.require('Blockly.Workspace');
 goog.require('Blockly.WorkspaceAudio');
@@ -48,7 +49,6 @@ goog.require('Blockly.WorkspaceDragSurfaceSvg');
 goog.require('Blockly.Xml');
 goog.require('Blockly.ZoomControls');
 
-goog.require('goog.array');
 goog.require('goog.dom');
 goog.require('goog.math.Coordinate');
 
@@ -926,7 +926,7 @@ Blockly.WorkspaceSvg.prototype.highlightBlock = function(id, opt_state) {
     var state = (opt_state === undefined) || opt_state;
     // Using Set here would be great, but at the cost of IE10 support.
     if (!state) {
-      goog.array.remove(this.highlightedBlocks_, block);
+      Blockly.utils.arrayRemove(this.highlightedBlocks_, block);
     } else if (this.highlightedBlocks_.indexOf(block) == -1) {
       this.highlightedBlocks_.push(block);
     }