[DevTools] Remove SDKModels' fromTarget methods

third_party/WebKit/Source/devtools/front_end/sdk/CookieModel.js

Index: third_party/WebKit/Source/devtools/front_end/sdk/CookieModel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/CookieModel.js b/third_party/WebKit/Source/devtools/front_end/sdk/CookieModel.js
index a03c0e1cb6dd7920612555d90b97cd2f7e80b546..5920342e19c1f4521f4093ad43281634293bdf2d 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/CookieModel.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/CookieModel.js
@@ -32,14 +32,6 @@ SDK.CookieModel = class extends SDK.SDKModel {
   }
 
   /**
-   * @param {!SDK.Target} target
-   * @return {!SDK.CookieModel}
-   */
-  static fromTarget(target) {
-    return /** @type {!SDK.CookieModel} */ (target.model(SDK.CookieModel));
-  }
-
-  /**
    * @param {!SDK.Cookie} cookie
    * @param {string} resourceURL
    * @return {boolean}
@@ -126,7 +118,9 @@ SDK.CookieModel = class extends SDK.SDKModel {
       if (url && (!domain || url.securityOrigin() === domain))
         resourceURLs.push(resource.url);
     }
-    SDK.ResourceTreeModel.fromTarget(this.target()).forAllResources(populateResourceURLs);
+    var resourceTreeModel = this.target().model(SDK.ResourceTreeModel);
+    if (resourceTreeModel)
+      resourceTreeModel.forAllResources(populateResourceURLs);
     this.getCookiesAsync(resourceURLs, callback);
   }