Find Usages: Support of secondary constructors and delegation calls

idea/testData/findUsages/java/findConstructorUsages/secondaryConstructorByJavaNewExpression.0.java

@@ -0,0 +1,12 @@
+// PSI_ELEMENT: com.intellij.psi.PsiMethod
+// FIND_BY_REF
+// OPTIONS: usages
+public class JJ extends B {
+    public JJ(int i) {
+        super("");
+    }
+
+    void test() {
+        new <caret>B("");
+    }
+}