Adding AX test for input-file and enabling ax test for HR tag.

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 82150d6cdf99e471f0d450191c1f589c0e1f1acf..72e21c6021a6089ffc77b1f5f33d4d9604b8282c 100644
--- a/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
+++ b/content/browser/accessibility/dump_accessibility_tree_browsertest.cc
@@ -767,10 +767,7 @@ IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityHeading) {
   RunTest(FILE_PATH_LITERAL("heading.html"));
 }
 
-// Disabling temporarily. Will Enable once blink returns correct
-// role for hr tag.
-IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest,
-                       DISABLED_AccessibilityHR) {
+IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityHR) {
   RunTest(FILE_PATH_LITERAL("hr.html"));
 }
 
@@ -831,6 +828,10 @@ IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest,
   RunTest(FILE_PATH_LITERAL("input-datetime-local.html"));
 }
 
+IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityInputFile) {
+  RunTest(FILE_PATH_LITERAL("input-file.html"));
+}
+
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest,
                        AccessibilityInputImageButtonInMenu) {
   RunTest(FILE_PATH_LITERAL("input-image-button-in-menu.html"));