ATK: fix AXPlatformNodeAuraLinux ATK interfaces detection.

For choosing the ATK interfaces to support, AXPlatformNodeAuraLinux
was retrieving AtkRole, but it was comparing it with AXRole values,
so it was assigning wrong interfaces to roles.

Bug: 784583, 787371
Change-Id: Iad114c07e3e6860449b81771cb5d2808903fe603
Reviewed-on: https://chromium-review.googlesource.com/781761Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: José Dapena Paz <jose.dapena@lge.com>
Cr-Commit-Position: refs/heads/master@{#518412}

ui/accessibility/platform/ax_platform_node_auralinux.cc

@@ -508,18 +508,16 @@ int AXPlatformNodeAuraLinux::GetGTypeInterfaceMask() {
 
   // Value Interface
   int role = GetAtkRole();
-  if (role == ui::AX_ROLE_PROGRESS_INDICATOR ||
-      role == ui::AX_ROLE_SCROLL_BAR || role == ui::AX_ROLE_SLIDER) {
+  if (role == ATK_ROLE_SCROLL_BAR || role == ATK_ROLE_SLIDER) {
     interface_mask |= 1 << ATK_VALUE_INTERFACE;
   }
 
   // Document Interface
-  if (role == ui::AX_ROLE_DOCUMENT || role == ui::AX_ROLE_ROOT_WEB_AREA ||
-      role == ui::AX_ROLE_WEB_AREA)
+  if (role == ATK_ROLE_DOCUMENT_WEB)
     interface_mask |= 1 << ATK_DOCUMENT_INTERFACE;
 
   // Image Interface
-  if (role == ui::AX_ROLE_IMAGE || role == ui::AX_ROLE_IMAGE_MAP)
+  if (role == ATK_ROLE_IMAGE || role == ATK_ROLE_IMAGE_MAP)
     interface_mask |= 1 << ATK_IMAGE_INTERFACE;
 
   return interface_mask;