Add option to not dump childrens of a node in AX Tree.

content/browser/accessibility/browser_accessibility.cc

Index: content/browser/accessibility/browser_accessibility.cc
diff --git a/content/browser/accessibility/browser_accessibility.cc b/content/browser/accessibility/browser_accessibility.cc
index 2141fe3f982a5e6cc1a9fdf1ac5710e735524ab3..ced6ab537273391e1fda4a8f2d522850a54b0fb5 100644
--- a/content/browser/accessibility/browser_accessibility.cc
+++ b/content/browser/accessibility/browser_accessibility.cc
@@ -51,9 +51,12 @@ bool BrowserAccessibility::PlatformIsLeaf() const {
   // implementation details, but we want to expose them as leaves
   // to platform accessibility APIs.
   switch (GetRole()) {
+    case ui::AX_ROLE_DATE:

[dmazzoni, 2015/01/13 22:34:49]

Making the change here will actually make these controls inaccessible, it will
hide the important sub-controls from the platform.

Instead, we should just add a feature that allows tests to specify that children
shouldn't be dumped of a specific element.

We already have support for @NO_DUMP, which is used in tests like
button-name-calc.html and implemented in accessibility_tree_formatter.cc.

How about a new marker @NO_DUMP_CHILDREN that dumps that one node but not its
children?

+    case ui::AX_ROLE_DATE_TIME:
     case ui::AX_ROLE_LINE_BREAK:
     case ui::AX_ROLE_SLIDER:
     case ui::AX_ROLE_STATIC_TEXT:
+    case ui::AX_ROLE_TIME:
     case ui::AX_ROLE_TEXT_AREA:
     case ui::AX_ROLE_TEXT_FIELD:
       return true;