Add more logging to debug DumpAccessibilityEvent* test failures

content/browser/accessibility/browser_accessibility_manager_win.cc

 // 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_win.h"
 
 #include "base/command_line.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/windows_version.h"
 #include "content/browser/accessibility/browser_accessibility_state_impl.h"
@@ skipping 58 matching lines @@
 
 IAccessible* BrowserAccessibilityManagerWin::GetParentIAccessible() {
   if (!delegate_)
     return NULL;
   return delegate_->AccessibilityGetNativeViewAccessible();
 }
 
 void BrowserAccessibilityManagerWin::MaybeCallNotifyWinEvent(DWORD event,
                                                              LONG child_id) {
   BrowserAccessibilityDelegate* delegate = GetDelegateFromRootManager();
-  if (!delegate)
+  if (!delegate) {
+    // This line and other LOG(WARNING) lines are temporary, to debug
+    // flaky failures in DumpAccessibilityEvent* tests.
+    // http://crbug.com/440579
+    LOG(WARNING) << "Not firing AX event because of no delegate";
     return;
+  }
 
   HWND hwnd = delegate->AccessibilityGetAcceleratedWidget();
-  if (!hwnd)
+  if (!hwnd) {
+    LOG(WARNING) << "Not firing AX event because of no hwnd";
     return;
+  }
 
   ::NotifyWinEvent(event, hwnd, OBJID_CLIENT, child_id);
 }
 
 void BrowserAccessibilityManagerWin::OnNodeCreated(ui::AXNode* node) {
   BrowserAccessibilityManager::OnNodeCreated(node);
   BrowserAccessibility* obj = GetFromAXNode(node);
   LONG unique_id_win = obj->ToBrowserAccessibilityWin()->unique_id_win();
   unique_id_to_ax_id_map_[unique_id_win] = obj->GetId();
 }
@@ skipping 28 matching lines @@
   // This will clear focus_event_on_root_needed_ if successful.
   if (focus_ != tree_->GetRoot())
     NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, GetRoot());
   BrowserAccessibilityManager::OnWindowFocused();
 }
 
 void BrowserAccessibilityManagerWin::NotifyAccessibilityEvent(
     ui::AXEvent event_type,
     BrowserAccessibility* node) {
   BrowserAccessibilityDelegate* root_delegate = GetDelegateFromRootManager();
-  if (!root_delegate || !root_delegate->AccessibilityGetAcceleratedWidget())
+  if (!root_delegate || !root_delegate->AccessibilityGetAcceleratedWidget()) {
+    LOG(WARNING) << "Not firing AX event because of no root_delegate or hwnd";
     return;
+  }
 
   // Inline text boxes are an internal implementation detail, we don't
   // expose them to Windows.
   if (node->GetRole() == ui::AX_ROLE_INLINE_TEXT_BOX)
     return;
 
   // Don't fire focus, blur, or load complete notifications if the
   // window isn't focused, because that can confuse screen readers into
   // entering their "browse" mode.
   if ((event_type == ui::AX_EVENT_FOCUS ||
@@ skipping 160 matching lines @@
           child_manager->GetFromUniqueIdWin(unique_id_win);
       if (result)
         return result;
     }
   }
 
   return NULL;
 }
 
 }  // namespace content