Add verbose logging for native accessibility events.

content/browser/accessibility/browser_accessibility_manager_mac.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/accessibility/browser_accessibility_manager_mac.h"
 
 #import "base/mac/mac_util.h"
 #import "base/mac/sdk_forward_declarations.h"
 #include "base/logging.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 123 matching lines @@
   // information about the number of selected items will never be reported.
   BrowserAccessibility* node = BrowserAccessibilityManager::GetFocus();
   if (node && node->GetRole() == ui::AX_ROLE_LIST_BOX)
     return node;
 
   // For other roles, follow the active descendant.
   return GetActiveDescendantFocus(node);
 }
 
 void BrowserAccessibilityManagerMac::NotifyAccessibilityEvent(
+    BrowserAccessibilityEvent::Source source,
     ui::AXEvent event_type,
     BrowserAccessibility* node) {
   if (!node->IsNative())
     return;
 
   if (event_type == ui::AX_EVENT_FOCUS) {
     BrowserAccessibility* active_descendant = GetActiveDescendantFocus(node);
     if (active_descendant)
       node = active_descendant;
 
@@ skipping 232 matching lines @@
 
   // This code is to work around a bug in VoiceOver, where a new live
   // region that gets added is ignored. VoiceOver seems to only scan the
   // page for live regions once. By recreating the NSAccessibility
   // object for the root of the tree, we force VoiceOver to clear out its
   // internal state and find newly-added live regions this time.
   BrowserAccessibilityMac* root =
       static_cast<BrowserAccessibilityMac*>(GetRoot());
   if (root) {
     root->RecreateNativeObject();
-    NotifyAccessibilityEvent(ui::AX_EVENT_CHILDREN_CHANGED, root);
+    NotifyAccessibilityEvent(
+        BrowserAccessibilityEvent::FromTreeChange,
+        ui::AX_EVENT_CHILDREN_CHANGED,
+        root);
   }
 }
 
 NSDictionary* BrowserAccessibilityManagerMac::
     GetUserInfoForSelectedTextChangedNotification() {
   NSMutableDictionary* user_info = [[[NSMutableDictionary alloc] init]
       autorelease];
   [user_info setObject:@YES forKey:NSAccessibilityTextStateSyncKey];
   [user_info setObject:@(AXTextStateChangeTypeUnknown)
                 forKey:NSAccessibilityTextStateChangeTypeKey];
@@ skipping 45 matching lines @@
   }
 
   return @{
     NSAccessibilityTextStateChangeTypeKey : @(AXTextStateChangeTypeEdit),
     NSAccessibilityTextChangeValues : changes,
     NSAccessibilityTextChangeElement : native_node
   };
 }
 
 }  // namespace content