[DevTools] Remove relativeToElement from Dialog.

Source/devtools/front_end/sources/JavaScriptSourceFrame.js

Index: Source/devtools/front_end/sources/JavaScriptSourceFrame.js
diff --git a/Source/devtools/front_end/sources/JavaScriptSourceFrame.js b/Source/devtools/front_end/sources/JavaScriptSourceFrame.js
index d8700aeb48c337fab9a3723295331e0d87aa1ce0..6a6d2ddca7e34b40c564e908a9dc9dec83d25f1c 100644
--- a/Source/devtools/front_end/sources/JavaScriptSourceFrame.js
+++ b/Source/devtools/front_end/sources/JavaScriptSourceFrame.js
@@ -294,12 +294,11 @@ WebInspector.JavaScriptSourceFrame.prototype = {
         }
 
         /**
-         * @this {WebInspector.JavaScriptSourceFrame}
          * @param {!WebInspector.ResourceScriptFile} scriptFile
          */
         function addSourceMapURL(scriptFile)
         {
-            WebInspector.AddSourceMapURLDialog.show(this.element, addSourceMapURLDialogCallback.bind(null, scriptFile));
+            WebInspector.AddSourceMapURLDialog.show(addSourceMapURLDialogCallback.bind(null, scriptFile));
         }
 
         /**
@@ -319,7 +318,7 @@ WebInspector.JavaScriptSourceFrame.prototype = {
             if (this._scriptFileForTarget.size) {
                 var scriptFile = this._scriptFileForTarget.valuesArray()[0];
                 var addSourceMapURLLabel = WebInspector.UIString.capitalize("Add ^source ^map\u2026");
-                contextMenu.appendItem(addSourceMapURLLabel, addSourceMapURL.bind(this, scriptFile));
+                contextMenu.appendItem(addSourceMapURLLabel, addSourceMapURL.bind(null, scriptFile));
                 contextMenu.appendSeparator();
             }
         }