Devtools: Move animation to separate module

Source/devtools/front_end/animation/AnimationModel.js

Index: Source/devtools/front_end/animation/AnimationModel.js
diff --git a/Source/devtools/front_end/sdk/AnimationModel.js b/Source/devtools/front_end/animation/AnimationModel.js
similarity index 96%
rename from Source/devtools/front_end/sdk/AnimationModel.js
rename to Source/devtools/front_end/animation/AnimationModel.js
index 1c42e10a1ceb7c0d5bc9ff58a6060be1b69e3a5c..05465ed8f51e917c85371b7a655df50bc0e6ce7b 100644
--- a/Source/devtools/front_end/sdk/AnimationModel.js
+++ b/Source/devtools/front_end/animation/AnimationModel.js
@@ -82,6 +82,20 @@ WebInspector.AnimationModel.prototype = {
     __proto__: WebInspector.SDKModel.prototype
 }
 
+WebInspector.AnimationModel._symbol = Symbol("AnimationModel");
+
+/**
+ * @param {!WebInspector.Target} target
+ * @return {!WebInspector.AnimationModel}
+ */
+WebInspector.AnimationModel.fromTarget = function(target)
+{
+    if (!target[WebInspector.AnimationModel._symbol])
+        target[WebInspector.AnimationModel._symbol] = new WebInspector.AnimationModel(target);
+
+    return target[WebInspector.AnimationModel._symbol];
+}
+
 /**
  * @constructor
  * @extends {WebInspector.SDKObject}