Added support for header and footer inside other sections, according to HTML API Mappings 1.0.

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 b5b8ccdc9a32e568a7f341912872eba86c659ef4..0e4e6a81fc44e0d0491c565abbaeec8d9052c841 100644
--- a/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
+++ b/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
@@ -835,6 +835,11 @@ IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityFooter) {
   RunHtmlTest(FILE_PATH_LITERAL("footer.html"));
 }
 
+IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest,
+    AccessibilityFooterInsideOtherSection) {
+  RunHtmlTest(FILE_PATH_LITERAL("footer-inside-other-section.html"));
+}
+
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityForm) {
   RunHtmlTest(FILE_PATH_LITERAL("form.html"));
 }
@@ -851,6 +856,11 @@ IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityHeader) {
   RunHtmlTest(FILE_PATH_LITERAL("header.html"));
 }
 
+IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest,
+    AccessibilityHeaderInsideOtherSection) {
+  RunHtmlTest(FILE_PATH_LITERAL("header-inside-other-section.html"));
+}
+
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityHeading) {
   RunHtmlTest(FILE_PATH_LITERAL("heading.html"));
 }