test: fix failures on firefox, webkit and windows bots

- connectOverCDP is now supported in WebKit: skip the not-chromium test
  there and expect the new error message
- accept all close-time messages in waitForNavigation-after-disconnect
- wait 2s for page errors to accumulate, mirrors upstream #38378
- regenerate firefox screenshot expectations for Firefox 151

playwright/src/test/java/com/microsoft/playwright/TestBrowserTypeBasic.java

@@ -40,10 +40,14 @@ public class TestBrowserTypeBasic extends TestBase {
     assertEquals(getBrowserNameFromEnv(), browserType.name());
   }
 
+  static boolean isChromiumOrWebKit() {
+    return isChromium() || isWebKit();
+  }
+
   @Test
-  @DisabledIf(value="com.microsoft.playwright.TestBase#isChromium", disabledReason="Non-chromium behavior")
+  @DisabledIf(value="isChromiumOrWebKit", disabledReason="Connecting over CDP is supported in Chromium and WebKit")
   void shouldThrowWhenTryingToConnectWithNotChromium() {
     PlaywrightException e = assertThrows(PlaywrightException.class, () -> browserType.connectOverCDP("foo"));
-    assertTrue(e.getMessage().contains("Connecting over CDP is only supported in Chromium."));
+    assertTrue(e.getMessage().contains("Connecting over CDP is only supported in Chromium and WebKit."));
   }
 }

playwright/src/test/java/com/microsoft/playwright/TestBrowserTypeConnect.java

@@ -259,7 +259,9 @@ public class TestBrowserTypeConnect extends TestBase {
     }
     assertFalse(browser.isConnected());
     PlaywrightException e = assertThrows(PlaywrightException.class, () -> page.waitForNavigation(() -> {}));
-    assertTrue(e.getMessage().contains("Target page, context or browser has been closed"), e.getMessage());
+    assertTrue(e.getMessage().contains("Browser closed") ||
+      e.getMessage().contains("Page closed") ||
+      e.getMessage().contains("Target page, context or browser has been closed"), e.getMessage());
   }
 
   @Test

playwright/src/test/java/com/microsoft/playwright/TestPageEventPageError.java

@@ -30,7 +30,7 @@ public class TestPageEventPageError extends TestBase {
     page.evaluate("async () => {\n" +
       "    for (let i = 0; i < 301; i++)\n" +
       "      window.setTimeout(() => { throw new Error('error' + i); }, 0);\n" +
-      "    await new Promise(f => window.setTimeout(f, 100));\n" +
+      "    await new Promise(f => window.setTimeout(f, 2000));\n" +
       "  }");
 
     List<String> errors = page.pageErrors();