Update select_test.html for Chrome 45.

Update tests to reflect that Chrome 45+ no longer
incorrectly fires a 'change' event in 4 tests.

Signed-off-by: Seva Lotoshnikov <vlotoshnikov@gmail.com>

javascript/atoms/test/select_test.html

@@ -360,13 +360,25 @@
 
       action(elem);
 
-      // WebKit and IE9 standards mode fire change events when the
-      // checkbox isn't toggled.
-      assertChanges(
-          goog.userAgent.WEBKIT || bot.userAgent.IE_DOC_9 ? 1 : 0);
+      // Some browsers fire change events when the checkbox isn't toggled.
+      assertChanges(firesChangeEventIfNotToggled() ? 1 : 0);
       assertFalse(bot.dom.isSelected(elem));
     }
 
+    function firesChangeEventIfNotToggled() {
+      if (goog.userAgent.product.CHROME && bot.userAgent.isProductVersion(45)) {
+        // Chrome 45 and above do not fire the change event.
+        return false;
+      } else if (goog.userAgent.WEBKIT || bot.userAgent.IE_DOC_9) {
+        // Other browsers with goog.userAgent.WEBKIT fire the change event.
+        // IE 9 standards mode fires the change event.
+        return true;
+      }
+
+      // All other browsers do not fire the change event.
+      return false;
+    }
+
     var testClickCannotSelectCheckboxWhenDefaultPrevented =
         goog.partial(cannotSelectCheckboxWhenDefaultPrevented,
                      bot.action.click);
@@ -394,12 +406,8 @@
         assertChanges(1);
         assertTrue(bot.dom.isSelected(elem));
       } else {
-        // IE9 standards mode and Chrome still fire the change event.
-        if (bot.userAgent.IE_DOC_9 || goog.userAgent.product.CHROME) {
-          assertChanges(1);
-        } else {
-          assertChanges(0);
-        }
+        // Some browsers fire change events when the checkbox isn't toggled.
+        assertChanges(firesChangeEventIfNotToggled() ? 1 : 0);
         assertFalse(bot.dom.isSelected(elem));
       }
     }