Made a getThisContainer function.

Author: DanielRosenwasser

src/compiler/parser.ts

@@ -430,6 +430,14 @@ module ts {
         }
     }
 
+    export function getThisContainer(node: Node): Node {
+        do {
+            node = getThisContainerOrArrowFunction(node);
+        } while (node.kind === SyntaxKind.ArrowFunction);
+
+        return node;
+    }
+
     export function hasRestParameters(s: SignatureDeclaration): boolean {
         return s.parameters.length > 0 && (s.parameters[s.parameters.length - 1].flags & NodeFlags.Rest) !== 0;
     }

src/services/services.ts

@@ -2629,10 +2629,7 @@ module ts {
 
             function getReferencesForThisKeyword(thisKeyword: Node, sourceFiles: SourceFile[]) {
                 // Get the owner" of the 'this' keyword.
-                var thisContainer = thisKeyword;
-                do {
-                    thisContainer = getThisContainerOrArrowFunction(thisContainer);
-                } while (thisContainer.kind === SyntaxKind.ArrowFunction);
+                var thisContainer = getThisContainer(thisKeyword);
 
                 var searchSpaceNode: Node;
 
@@ -2683,10 +2680,7 @@ module ts {
                         }
 
                         // Get the owner" of the 'this' keyword.
-                        var container = node;
-                        do {
-                            container = getThisContainerOrArrowFunction(container);
-                        } while (container.kind === SyntaxKind.ArrowFunction);
+                        var container = getThisContainer(node);
 
                         switch (container.kind) {
                             case SyntaxKind.Property: