Fire accessibility focus/blur events on root web document.

content/browser/accessibility/browser_accessibility_manager_win.cc

Index: content/browser/accessibility/browser_accessibility_manager_win.cc
diff --git a/content/browser/accessibility/browser_accessibility_manager_win.cc b/content/browser/accessibility/browser_accessibility_manager_win.cc
index 98350450151f27bb4ad6781dea6f829cd2476ecc..e8055faf5654b2537d3fcb18332176b4292e43d9 100644
--- a/content/browser/accessibility/browser_accessibility_manager_win.cc
+++ b/content/browser/accessibility/browser_accessibility_manager_win.cc
@@ -97,6 +97,20 @@ void BrowserAccessibilityManagerWin::RemoveNode(BrowserAccessibility* node) {
   }
 }
 
+void BrowserAccessibilityManagerWin::OnWindowFocused() {
+  // Fire a focus event on the root first and then the focused node.
+  if (focus_ != root_)
+    NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, root_);
+  BrowserAccessibilityManager::OnWindowFocused();
+}
+
+void BrowserAccessibilityManagerWin::OnWindowBlurred() {
+  // Fire a blur event on the focused node first and then the root.
+  BrowserAccessibilityManager::OnWindowBlurred();
+  if (focus_ != root_)
+    NotifyAccessibilityEvent(ui::AX_EVENT_BLUR, root_);
+}
+
 void BrowserAccessibilityManagerWin::NotifyAccessibilityEvent(
     ui::AXEvent event_type,
     BrowserAccessibility* node) {