Fire load complete notifications on Mac even when page loads quickly.

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"
 
 #include "base/bind.h"
 #import "base/mac/mac_util.h"
 #import "base/mac/scoped_nsobject.h"
 #import "base/mac/sdk_forward_declarations.h"
@@ skipping 559 matching lines @@
     if (change.node->data().HasStringAttribute(
             ui::AX_ATTR_CONTAINER_LIVE_STATUS)) {
       ui::AXNode* live_root = change.node;
       while (live_root &&
              !live_root->data().HasStringAttribute(ui::AX_ATTR_LIVE_STATUS))
         live_root = live_root->parent();
       if (live_root)
         tree_events_[live_root->id()].insert(ui::AX_EVENT_LIVE_REGION_CHANGED);
     }
   }
+
+  if (root_changed && tree->data().loaded)
+    tree_events_[tree->root()->id()].insert(ui::AX_EVENT_LOAD_COMPLETE);
 }
 
 NSDictionary* BrowserAccessibilityManagerMac::
     GetUserInfoForSelectedTextChangedNotification() {
   NSMutableDictionary* user_info = [[[NSMutableDictionary alloc] init]
       autorelease];
   [user_info setObject:@YES forKey:NSAccessibilityTextStateSyncKey];
   [user_info setObject:@(AXTextStateChangeTypeUnknown)
                 forKey:NSAccessibilityTextStateChangeTypeKey];
   [user_info setObject:@(AXTextSelectionDirectionUnknown)
@@ skipping 52 matching lines @@
     NSAccessibilityTextChangeValues : changes,
     NSAccessibilityTextChangeElement : native_node
   };
 }
 
 NSView* BrowserAccessibilityManagerMac::GetParentView() {
   return delegate() ? delegate()->AccessibilityGetAcceleratedWidget() : nullptr;
 }
 
 }  // namespace content