ARIA role math and HTML math element are not exposed correctly.

content/browser/accessibility/dump_accessibility_tree_browsertest.cc

Index: content/browser/accessibility/dump_accessibility_tree_browsertest.cc
diff --git a/content/browser/accessibility/dump_accessibility_tree_browsertest.cc b/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
index 03aaeb3fdb59a07d173bbbbcc302b68ded88ad45..41d69e3aa5089b797f3b084aa87359b040b170a0 100644
--- a/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
+++ b/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
@@ -486,6 +486,10 @@ IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest,
   RunTest(FILE_PATH_LITERAL("aria-orientation.html"));
 }
 
+IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityAriaMath) {
+  RunTest(FILE_PATH_LITERAL("aria-math.html"));
+}
+
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityAriaNone) {
   RunTest(FILE_PATH_LITERAL("aria-none.html"));
 }
@@ -870,6 +874,10 @@ IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityMark) {
   RunTest(FILE_PATH_LITERAL("mark.html"));
 }
 
+IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityMath) {
+  RunTest(FILE_PATH_LITERAL("math.html"));
+}
+
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest,
                        AccessibilityMenutypecontext) {
   RunTest(FILE_PATH_LITERAL("menu-type-context.html"));