Test aria-pressed=mixed on windows

ui/accessibility/platform/ax_platform_node_win.cc

Index: ui/accessibility/platform/ax_platform_node_win.cc
diff --git a/ui/accessibility/platform/ax_platform_node_win.cc b/ui/accessibility/platform/ax_platform_node_win.cc
index 6dcdc91e23134602f6be614e7d9fd9f4f6b9761c..dabdd1b2225d2b151a8c08b0a06f157f4ec360bd 100644
--- a/ui/accessibility/platform/ax_platform_node_win.cc
+++ b/ui/accessibility/platform/ax_platform_node_win.cc
@@ -1125,8 +1125,6 @@ int AXPlatformNodeWin::MSAAState() {
     msaa_state |= STATE_SYSTEM_LINKED;
   if (state & (1 << ui::AX_STATE_OFFSCREEN))
     msaa_state |= STATE_SYSTEM_OFFSCREEN;
-  if (state & (1 << ui::AX_STATE_PRESSED))
-    msaa_state |= STATE_SYSTEM_PRESSED;
   if (state & (1 << ui::AX_STATE_PROTECTED))
     msaa_state |= STATE_SYSTEM_PROTECTED;
   if (state & (1 << ui::AX_STATE_READ_ONLY))
@@ -1139,13 +1137,27 @@ int AXPlatformNodeWin::MSAAState() {
     msaa_state |= STATE_SYSTEM_UNAVAILABLE;
 
   // Checked state
-  const auto checked_state = static_cast<ui::AXCheckedState>(
+  const auto checked_state = static_cast<ui::AXButtonState>(
       GetIntAttribute(ui::AX_ATTR_CHECKED_STATE));
   switch (checked_state) {
-    case ui::AX_CHECKED_STATE_TRUE:
+    case ui::AX_BUTTON_STATE_TRUE:
       msaa_state |= STATE_SYSTEM_CHECKED;
       break;
-    case ui::AX_CHECKED_STATE_MIXED:
+    case ui::AX_BUTTON_STATE_MIXED:
+      msaa_state |= STATE_SYSTEM_MIXED;
+      break;
+    default:
+      break;
+  }
+
+  // Pressed state
+  const auto pressed_state = static_cast<ui::AXButtonState>(
+      GetIntAttribute(ui::AX_ATTR_PRESSED_STATE));
+  switch (pressed_state) {
+    case ui::AX_BUTTON_STATE_TRUE:
+      msaa_state |= STATE_SYSTEM_CHECKED;
+      break;
+    case ui::AX_BUTTON_STATE_MIXED:
       msaa_state |= STATE_SYSTEM_MIXED;
       break;
     default: