Fix a zooming bug with EM MQs

LayoutTests/fast/css/zoom-media-queries-expected.txt

Index: LayoutTests/fast/css/zoom-media-queries-expected.txt
diff --git a/LayoutTests/fast/css/zoom-media-queries-expected.txt b/LayoutTests/fast/css/zoom-media-queries-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..30162045c39668c661aeac63efadddd2c7a1978e
--- /dev/null
+++ b/LayoutTests/fast/css/zoom-media-queries-expected.txt
@@ -0,0 +1,37 @@
+PASS matchMedia("(max-width: 300px)").matches is false
+PASS matchMedia("(max-width: 18.75em)").matches is false
+
+eventSender.zoomPageIn()
+PASS matchMedia("(max-width: 300px)").matches is matchMedia("(max-width: 18.75em)").matches
+eventSender.zoomPageIn()
+PASS matchMedia("(max-width: 300px)").matches is matchMedia("(max-width: 18.75em)").matches
+eventSender.zoomPageIn()
+PASS matchMedia("(max-width: 300px)").matches is matchMedia("(max-width: 18.75em)").matches
+eventSender.zoomPageIn()
+PASS matchMedia("(max-width: 300px)").matches is matchMedia("(max-width: 18.75em)").matches
+eventSender.zoomPageIn()
+PASS matchMedia("(max-width: 300px)").matches is matchMedia("(max-width: 18.75em)").matches
+eventSender.zoomPageIn()
+
+PASS matchMedia("(max-width: 300px)").matches is true
+PASS matchMedia("(max-width: 18.75em)").matches is true
+
+eventSender.zoomPageOut()
+PASS matchMedia("(max-width: 300px)").matches is false
+PASS matchMedia("(max-width: 18.75em)").matches is false
+eventSender.zoomPageOut()
+PASS matchMedia("(max-width: 300px)").matches is false
+PASS matchMedia("(max-width: 18.75em)").matches is false
+eventSender.zoomPageOut()
+PASS matchMedia("(max-width: 300px)").matches is false
+PASS matchMedia("(max-width: 18.75em)").matches is false
+eventSender.zoomPageOut()
+PASS matchMedia("(max-width: 300px)").matches is false
+PASS matchMedia("(max-width: 18.75em)").matches is false
+eventSender.zoomPageOut()
+PASS matchMedia("(max-width: 300px)").matches is false
+PASS matchMedia("(max-width: 18.75em)").matches is false
+eventSender.zoomPageOut()
+PASS matchMedia("(max-width: 300px)").matches is false
+PASS matchMedia("(max-width: 18.75em)").matches is false
+