Devtools Animations: Add cubic bezier easing editor for animations

Source/devtools/front_end/elements/StylesPopoverHelper.js

Index: Source/devtools/front_end/elements/StylesPopoverHelper.js
diff --git a/Source/devtools/front_end/elements/StylesPopoverHelper.js b/Source/devtools/front_end/elements/StylesPopoverHelper.js
index a99fb29622d24596fc36ffaec75c6df68da01cd4..93a18bbd514a8f8ae2228ca6c54a6467ee76185d 100644
--- a/Source/devtools/front_end/elements/StylesPopoverHelper.js
+++ b/Source/devtools/front_end/elements/StylesPopoverHelper.js
@@ -148,6 +148,20 @@ WebInspector.BezierPopoverIcon = function(treeElement, stylesPopoverHelper, text
     this._boundBezierChanged = this._bezierChanged.bind(this);
 }
 
+/**
+ * @param {!Element} parentElement
+ * @return {!Element}
+ */
+WebInspector.BezierPopoverIcon.createIcon = function(parentElement)
+{
+    var element = parentElement.createSVGChild("svg", "popover-icon bezier-icon");
+    element.setAttribute("height", 10);
+    element.setAttribute("width", 10);
+    var path = element.createSVGChild("path");
+    path.setAttribute("d", "M2,8 C2,3 8,7 8,2");
+    return element;
+}
+
 WebInspector.BezierPopoverIcon.prototype = {
     /**
      * @return {!Element}
@@ -163,15 +177,8 @@ WebInspector.BezierPopoverIcon.prototype = {
     _createDOM: function(text)
     {
         this._element = createElement("nobr");
-
-        this._iconElement = this._element.createSVGChild("svg", "popover-icon bezier-icon");
-        this._iconElement.setAttribute("height", 10);
-        this._iconElement.setAttribute("width", 10);
+        this._iconElement = WebInspector.BezierPopoverIcon.createIcon(this._element);
         this._iconElement.addEventListener("click", this._iconClick.bind(this), false);
-        var g = this._iconElement.createSVGChild("g");
-        var path = g.createSVGChild("path");
-        path.setAttribute("d", "M2,8 C2,3 8,7 8,2");
-
         this._bezierValueElement = this._element.createChild("span");
         this._bezierValueElement.textContent = text;
     },