Match camelCased SVG attributes selectors in html documents.

third_party/WebKit/LayoutTests/svg/css/attribute-selector.svg

Index: third_party/WebKit/LayoutTests/svg/css/attribute-selector.svg
diff --git a/third_party/WebKit/LayoutTests/svg/css/attribute-selector.svg b/third_party/WebKit/LayoutTests/svg/css/attribute-selector.svg
new file mode 100644
index 0000000000000000000000000000000000000000..db30b43b7e806beb668445d465b78f3a27e38fae
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/svg/css/attribute-selector.svg
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" viewBox="0 0 800 600" xmlns="http://www.w3.org/2000/svg" width="600" height="500">
+<style>
+    [viewBox] { background-color: green; }
+    [viewbox], [VIEWBOX] { background-color: red; }
+</style>
+<text y="20">You should see the word PASS below and the background should be green.</text>
+<text y="40" id="result">FAIL</text>
+<script>
+    if (window.testRunner)
+        testRunner.dumpAsText();
+
+    if (getComputedStyle(document.querySelector("svg")).backgroundColor == "rgb(0, 128, 0)")
+        document.getElementById("result").firstChild.data = "PASS";
+</script>
+</svg>