[DevTools] Replace the target type with capabilities

third_party/WebKit/Source/devtools/front_end/animation/AnimationModel.js

 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 /**
  * @constructor
  * @extends {WebInspector.SDKModel}
  * @param {!WebInspector.Target} target
  */
@@ skipping 184 matching lines @@
         this._enabled = true;
     },
 
     __proto__: WebInspector.SDKModel.prototype
 }
 
 WebInspector.AnimationModel._symbol = Symbol("AnimationModel");
 
 /**
  * @param {!WebInspector.Target} target
- * @return {!WebInspector.AnimationModel}
+ * @return {?WebInspector.AnimationModel}
  */
 WebInspector.AnimationModel.fromTarget = function(target)
 {
+    if (!target.hasBrowserCapability())
+        return null;
     if (!target[WebInspector.AnimationModel._symbol])
         target[WebInspector.AnimationModel._symbol] = new WebInspector.AnimationModel(target);
 
     return target[WebInspector.AnimationModel._symbol];
 }
 
 /**
  * @constructor
  * @extends {WebInspector.SDKObject}
  * @param {!WebInspector.Target} target
@@ skipping 724 matching lines @@
         if (!this._capturing)
             return;
 
         delete this._stopTimer;
         delete this._endTime;
         this._requests = [];
         this._capturing = false;
         this._target.pageAgent().stopScreencast();
     }
 }