Fix some modern browsers tests failures.

Change-Id: I2a89d3493e2f98ab1b9a0666d9dc075a2457e432

uitest/src/test/java/com/vaadin/tests/components/abstractembedded/EmbeddedWithNullSourceTest.java

@@ -31,8 +31,9 @@ public class EmbeddedWithNullSourceTest extends MultiBrowserTest {
     public List<DesiredCapabilities> getBrowsersToTest() {
         // No Flash on PhantomJS, IE 11 has a timeout issue, looks like a
         // IEDriver problem, not reproduced running locally.
+        // Flash is disabled in Chrome.
         return getBrowserCapabilities(Browser.IE8, Browser.IE9, Browser.IE10,
-                Browser.CHROME, Browser.FIREFOX);
+                Browser.FIREFOX);
     }
 
     @Test

uitest/src/test/java/com/vaadin/tests/components/flash/FlashIsVisibleTest.java

@@ -15,7 +15,7 @@ public class FlashIsVisibleTest extends MultiBrowserTest {
         // FF and PhantomJS fail at Flash and ShiftClick
         List<DesiredCapabilities> capabilities = getBrowsersSupportingShiftClick();
         // Flash support in Chrome is disabled
-        capabilities.remove(Browser.CHROME);
+        capabilities.removeAll(getBrowserCapabilities(Browser.CHROME));
         return capabilities;
     }
 

uitest/src/test/java/com/vaadin/tests/components/uitest/ThemeTest.java

@@ -9,11 +9,11 @@ import org.openqa.selenium.interactions.Actions;
 
 import com.vaadin.testbench.By;
 import com.vaadin.testbench.elements.ButtonElement;
+import com.vaadin.testbench.elements.ComboBoxElement;
 import com.vaadin.testbench.elements.TableElement;
 import com.vaadin.testbench.elementsbase.ServerClass;
 import com.vaadin.testbench.parallel.BrowserUtil;
 import com.vaadin.tests.tb3.MultiBrowserTest;
-import com.vaadin.tests.tb3.newelements.ComboBoxElement;
 import com.vaadin.tests.tb3.newelements.FixedNotificationElement;
 import com.vaadin.tests.tb3.newelements.WindowElement;