Sets the readonly state on read-only text fields on Windows.

content/browser/accessibility/browser_accessibility_win.cc

Index: content/browser/accessibility/browser_accessibility_win.cc
diff --git a/content/browser/accessibility/browser_accessibility_win.cc b/content/browser/accessibility/browser_accessibility_win.cc
index aca1a5841402f061555cdc2f375757d86e5939b6..552a87778ed1cf357702481ef70df5592856a6c9 100644
--- a/content/browser/accessibility/browser_accessibility_win.cc
+++ b/content/browser/accessibility/browser_accessibility_win.cc
@@ -5438,10 +5438,13 @@ void BrowserAccessibilityWin::InitRoleAndState() {
     case ui::AX_ROLE_TEXT_FIELD:
     case ui::AX_ROLE_SEARCH_BOX:
       ia_role = ROLE_SYSTEM_TEXT;
-      if (HasState(ui::AX_STATE_MULTILINE))
+      if (HasState(ui::AX_STATE_MULTILINE)) {
         ia2_state |= IA2_STATE_MULTI_LINE;
-      else
+      } else {
         ia2_state |= IA2_STATE_SINGLE_LINE;
+      }
+      if (HasState(ui::AX_STATE_READ_ONLY))
+        ia_state |= STATE_SYSTEM_READONLY;
       ia2_state |= IA2_STATE_SELECTABLE_TEXT;
       break;
     case ui::AX_ROLE_ABBR:
@@ -5496,7 +5499,8 @@ void BrowserAccessibilityWin::InitRoleAndState() {
   // Compute the final value of READONLY for MSAA.
   //
   // We always set the READONLY state for elements that have the
-  // aria-readonly attribute and for a few roles (in the switch above).
+  // aria-readonly attribute and for a few roles (in the switch above), such as
+  // read-only text fields.
   // We clear the READONLY state on focusable controls and on a document.
   // Everything else, the majority of objects, do not have this state set.
   if (HasState(ui::AX_STATE_FOCUSABLE) &&