test: Use real mouse events with Chromium in the shell

BiDi mouse events work fine on the top-level document (i.e. not in
frames). So let's use them to test the shell.

This gets rid of the recent TestHostSwitching mouse move hack (reverts
commit b5b8c6d), and we can also run `TestPages.testPageStatus`
again (reverts commit 529e334).

test/common/testlib.py

@@ -526,11 +526,11 @@ def mouse(
         # HACK: Chromium clicks don't work with iframes; use our old "synthesize MouseEvent" approach
         # https://issues.chromium.org/issues/359616812
         # TODO: x and y are not currently implemented: webdriver (0, 0) is the element's center, not top left corner
-        if self.browser == "chromium" or x != 0 or y != 0:
+        if (self.browser == "chromium" and not self.driver.in_top_context()) or x != 0 or y != 0:
             self.call_js_func('ph_mouse', selector, event, x, y, btn, ctrlKey, shiftKey, altKey, metaKey)
             return
 
-        # For Firefox and regular clicks, use the BiDi API, which is more realistic -- it doesn't
+        # For Firefox and top frame with Chromium, use the BiDi API, which is more realistic -- it doesn't
         # sidestep the browser
         element = self.call_js_func('ph_find_scroll_into_view' if scrollVisible else 'ph_find', selector)
 

test/common/webdriver_bidi.py

@@ -326,6 +326,9 @@ def switch_to_top(self) -> None:
         self.context = self.top_context
         log_command.info("← switch_to_top")
 
+    def in_top_context(self) -> bool:
+        return self.context == self.top_context
+
     @contextlib.contextmanager
     def restore_context(self) -> Iterator[None]:
         saved = self.context

test/verify/check-pages

@@ -752,7 +752,6 @@ OnCalendar=daily
         with b.wait_timeout(60):
             b.wait_js_func("ph_plot_data_plateau", "pmcd", mem_avail * 0.85, mem_avail * 1.15, 15, "mem")
 
-    @testlib.skipBrowser("Headless chromium is missing the synthetic mouseenter", "chromium")
     def testPageStatus(self):
         b = self.browser
 

test/verify/check-shell-host-switching

@@ -183,14 +183,6 @@ class TestHostSwitching(testlib.MachineCase, HostSwitcherHelpers):
         b.wait_not_present("#nav-system.interact")
         b.set_layout("desktop")
 
-        # this looks different (focused) when the mouse is inside (default 0,0 possition), so move it away
-        # chromium is stubborn here, we *have* to move the real mouse, not just do this with synthetic MouseEvents
-        b.bidi("input.performActions", context=b.driver.context, actions=[{
-            "id": "move-away",
-            "type": "pointer",
-            "parameters": {"pointerType": "mouse"},
-            "actions": [{"type": "pointerMove", "x": 200, "y": 200, "origin": "viewport"}]
-        }])
         b.assert_pixels("#hosts-sel", "hosts-sel-closed")
 
         b.click("#hosts-sel button")