Add an additional test for static method disambiguation on ES5 classes.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=248616183

test/com/google/javascript/jscomp/DisambiguatePropertiesTest.java

@@ -2987,7 +2987,32 @@ public void testQuotedEs6ClassSetters_areNotDisambiguated() {
   }
 
   @Test
-  public void testDisambiguateEs6ClassStaticMethods() {
+  public void testDisambiguateEs5StaticMethods_declaredOutsideBody() {
+    test(
+        lines(
+            "/** @constructor */",
+            "function Foo() {}",
+            "Foo.method = function() { };",
+            "",
+            "class Bar {}",
+            "Bar.method = function() { };",
+            "",
+            "Foo.method();",
+            "Bar.method();"),
+        lines(
+            "/** @constructor */",
+            "function Foo() {}",
+            "Foo._typeof_Foo_$method = function() {}",
+            "",
+            "class Bar {}",
+            "Bar._typeof_Bar_$method = function() {}",
+            "",
+            "Foo._typeof_Foo_$method();",
+            "Bar._typeof_Bar_$method();"));
+  }
+
+  @Test
+  public void testDisambiguateEs6ClassStaticMethods_declaredInsideBody() {
     test(
         lines(
             "class Foo {",