Update example tests

Author: mdmintz

examples/shadow_root_test.py

@@ -11,9 +11,9 @@ def test_shadow_root(self):
             message = "Skipping test in Recorder Mode."
             print(message)
             self.skip(message)
-        elif self.browser == "safari":
+        elif not self.is_chromium():
             self.open_if_not_url("about:blank")
-            message = "Skipping test for using Safari."
+            message = "This test is only for Chromium browsers!"
             print(message)
             self.skip(message)
         self.open("https://seleniumbase.io/other/shadow_dom")

examples/test_cdp_ad_blocking.py

@@ -4,8 +4,11 @@
 
 class CDPNetworkBlockingTests(BaseCase):
     def test_cdp_network_blocking(self):
-        if not self.is_chromium:
-            self.skip("This test is only for Chromium browsers!")
+        self.open("about:blank")
+        if not self.is_chromium():
+            message = "This test is only for Chromium browsers!"
+            print(message)
+            self.skip(message)
         self.execute_cdp_cmd(
             'Network.setBlockedURLs', {"urls": [
                 "*googlesyndication.com*",
@@ -24,5 +27,4 @@ def test_cdp_network_blocking(self):
         source = self.get_page_source()
         self.assert_true("doubleclick.net" not in source)
         self.assert_true("google-analytics.com" not in source)
-        if self.demo_mode:
-            self.post_message("Blocking was successful!")
+        self.post_message("Blocking was successful!")