Filter out AX window events to make tests less flaky.

content/browser/accessibility/accessibility_event_recorder_win.cc

 // Copyright 2014 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/accessibility_event_recorder.h"
 
 #include <oleacc.h>
 
 #include <string>
 
@@ skipping 188 matching lines @@
   base::win::ScopedVariant role;
   iaccessible->get_accRole(childid_self, role.Receive());
   base::win::ScopedBstr name_bstr;
   iaccessible->get_accName(childid_self, name_bstr.Receive());
   base::win::ScopedBstr value_bstr;
   iaccessible->get_accValue(childid_self, value_bstr.Receive());
   base::win::ScopedVariant state;
   iaccessible->get_accState(childid_self, state.Receive());
   int ia_state = V_I4(state.ptr());
 
+  // Avoid flakiness. Events fired on a WINDOW are out of the control
+  // of a test.
+  if (role.type() == VT_I4 && ROLE_SYSTEM_WINDOW == V_I4(role.ptr())) {
+    VLOG(1) << "Ignoring event " << event << " on ROLE_SYSTEM_WINDOW";
+    return;
+  }
+
   // Avoid flakiness. The "offscreen" state depends on whether the browser
   // window is frontmost or not, and "hottracked" depends on whether the
   // mouse cursor happens to be over the element.
   ia_state &= (~STATE_SYSTEM_OFFSCREEN & ~STATE_SYSTEM_HOTTRACKED);
 
   // The "readonly" state is set on almost every node and doesn't typically
   // change, so filter it out to keep the output less verbose.
   ia_state &= ~STATE_SYSTEM_READONLY;
 
   AccessibleStates ia2_state = 0;
@@ skipping 57 matching lines @@
   if (accessibility_hwnd != hwnd)
     return E_FAIL;
 
   IAccessible* obj = manager_->GetRoot()->ToBrowserAccessibilityWin();
   obj->AddRef();
   *ppv_object = obj;
   return S_OK;
 }
 
 }  // namespace content