Compensate for source scaling in hidpi mode

third_party/WebKit/LayoutTests/fast/hidpi/image-set-border-image-button.html

Index: third_party/WebKit/LayoutTests/fast/hidpi/image-set-border-image-button.html
diff --git a/third_party/WebKit/LayoutTests/fast/hidpi/image-set-border-image-button.html b/third_party/WebKit/LayoutTests/fast/hidpi/image-set-border-image-button.html
new file mode 100644
index 0000000000000000000000000000000000000000..0fcceedfcb7bef5f8e57536a9230835c0d20d4c3
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/fast/hidpi/image-set-border-image-button.html
@@ -0,0 +1,19 @@
+<title>border-image with border-image-repeat in hidpi setting</title>

[fs, 2016/04/19 14:59:34]

Nit: Doctype? (I'm guessing this doesn't need quirks-mode?)

[davve, 2016/04/20 07:40:18]

Doh!

I copied another test in the directory to start from and didn't notice. Will
file another CL to add DOCTYPE to tests in this subdir for some sense of
consistency (and perhaps help future selves from making this error).

+<script src="resources/srcset-helper.js"></script>
+<!-- Mimicking hidpi border-image features from buttons in
+     ui/webui/resources/css/apps/common.css -->
+<style>
+div {
+    border-image-source: -webkit-image-set(
+        url(resources/black-blue-outline-6-px-square.png) 1x,
+        url(resources/black-blue-outline-12-px-square.png) 2x);
+    border-image-slice: 2 fill;
+    border-image-width: 2px;
+    border-image-repeat: repeat;
+    width: 100px;
+    height: 20px;
+    border-width: 2px;
+    border-style: solid;
+}
+</style>
+<div></div>