Re-land: Implement NativeViewAccessibilityWin using AXPlatformNodeWin.

ui/views/accessibility/native_view_accessibility_win.cc

Index: ui/views/accessibility/native_view_accessibility_win.cc
diff --git a/ui/views/accessibility/native_view_accessibility_win.cc b/ui/views/accessibility/native_view_accessibility_win.cc
index 1255f10068534e656c3f878202aa643f52d3fa0d..fd9edaa3e29d29e339861af10155a8e664abd714 100644
--- a/ui/views/accessibility/native_view_accessibility_win.cc
+++ b/ui/views/accessibility/native_view_accessibility_win.cc
@@ -5,7 +5,6 @@
 #include "ui/views/accessibility/native_view_accessibility_win.h"
 
 #include <oleacc.h>
-#include <UIAutomationClient.h>
 
 #include <set>
 #include <vector>
@@ -18,7 +17,6 @@
 #include "ui/accessibility/ax_enums.h"
 #include "ui/accessibility/ax_text_utils.h"
 #include "ui/accessibility/ax_view_state.h"
-#include "ui/base/win/accessibility_ids_win.h"
 #include "ui/base/win/accessibility_misc_utils.h"
 #include "ui/base/win/atl_module.h"
 #include "ui/views/controls/button/custom_button.h"
@@ -28,1531 +26,40 @@
 #include "ui/views/win/hwnd_util.h"
 
 namespace views {
-namespace {
-
-class AccessibleWebViewRegistry {
- public:
-  static AccessibleWebViewRegistry* GetInstance();
-
-  void RegisterWebView(View* web_view);
-
-  void UnregisterWebView(View* web_view);
-
-  // Given the view that received the request for the accessible
-  // id in |top_view|, and the child id requested, return the native
-  // accessible object with that child id from one of the WebViews in
-  // |top_view|'s view hierarchy, if any.
-  IAccessible* GetAccessibleFromWebView(View* top_view, long child_id);
-
-  // The system uses IAccessible APIs for many purposes, but only
-  // assistive technology like screen readers uses IAccessible2.
-  // Call this method to note that the IAccessible2 interface was queried and
-  // that WebViews should be proactively notified that this interface will be
-  // used. If this is enabled for the first time, this will explicitly call
-  // QueryService with an argument of IAccessible2 on all WebViews, otherwise
-  // it will just do it from now on.
-  void EnableIAccessible2Support();
-
- private:
-  friend struct DefaultSingletonTraits<AccessibleWebViewRegistry>;
-  AccessibleWebViewRegistry();
-  ~AccessibleWebViewRegistry() {}
-
-  IAccessible* AccessibleObjectFromChildId(View* web_view, long child_id);
-
-  void QueryIAccessible2Interface(View* web_view);
-
-  // Set of all web views. We check whether each one is contained in a
-  // top view dynamically rather than keeping track of a map.
-  std::set<View*> web_views_;
-
-  // The most recent top view used in a call to GetAccessibleFromWebView.
-  View* last_top_view_;
-
-  // The most recent web view where an accessible object was found,
-  // corresponding to |last_top_view_|.
-  View* last_web_view_;
-
-  // If IAccessible2 support is enabled, we query the IAccessible2 interface
-  // of WebViews proactively when they're registered, so that they are
-  // aware that they need to support this interface.
-  bool iaccessible2_support_enabled_;
-
-  DISALLOW_COPY_AND_ASSIGN(AccessibleWebViewRegistry);
-};
-
-AccessibleWebViewRegistry::AccessibleWebViewRegistry()
-    : last_top_view_(NULL),
-      last_web_view_(NULL),
-      iaccessible2_support_enabled_(false) {
-}
-
-AccessibleWebViewRegistry* AccessibleWebViewRegistry::GetInstance() {
-  return Singleton<AccessibleWebViewRegistry>::get();
-}
-
-void AccessibleWebViewRegistry::RegisterWebView(View* web_view) {
-  DCHECK(web_views_.find(web_view) == web_views_.end());
-  web_views_.insert(web_view);
-
-  if (iaccessible2_support_enabled_)
-    QueryIAccessible2Interface(web_view);
-}
-
-void AccessibleWebViewRegistry::UnregisterWebView(View* web_view) {
-  DCHECK(web_views_.find(web_view) != web_views_.end());
-  web_views_.erase(web_view);
-  if (last_web_view_ == web_view) {
-    last_top_view_ = NULL;
-    last_web_view_ = NULL;
-  }
-}
-
-IAccessible* AccessibleWebViewRegistry::GetAccessibleFromWebView(
-    View* top_view, long child_id) {
-  // This function gets called frequently, so try to avoid searching all
-  // of the web views if the notification is on the same web view that
-  // sent the last one.
-  if (last_top_view_ == top_view) {
-    IAccessible* accessible =
-        AccessibleObjectFromChildId(last_web_view_, child_id);
-    if (accessible)
-      return accessible;
-  }
-
-  // Search all web views. For each one, first ensure it's a descendant
-  // of this view where the event was posted - and if so, see if it owns
-  // an accessible object with that child id. If so, save the view to speed
-  // up the next notification.
-  for (std::set<View*>::iterator iter = web_views_.begin();
-       iter != web_views_.end(); ++iter) {
-    View* web_view = *iter;
-    if (top_view == web_view || !top_view->Contains(web_view))
-      continue;
-    IAccessible* accessible = AccessibleObjectFromChildId(web_view, child_id);
-    if (accessible) {
-      last_top_view_ = top_view;
-      last_web_view_ = web_view;
-      return accessible;
-    }
-  }
-
-  return NULL;
-}
-
-void AccessibleWebViewRegistry::EnableIAccessible2Support() {
-  if (iaccessible2_support_enabled_)
-    return;
-  iaccessible2_support_enabled_ = true;
-  for (std::set<View*>::iterator iter = web_views_.begin();
-       iter != web_views_.end(); ++iter) {
-    QueryIAccessible2Interface(*iter);
-  }
-}
-
-IAccessible* AccessibleWebViewRegistry::AccessibleObjectFromChildId(
-    View* web_view,
-    long child_id) {
-  IAccessible* web_view_accessible = web_view->GetNativeViewAccessible();
-  if (web_view_accessible == NULL)
-    return NULL;
-
-  VARIANT var_child;
-  var_child.vt = VT_I4;
-  var_child.lVal = child_id;
-  IAccessible* result = NULL;
-  if (S_OK == web_view_accessible->get_accChild(
-      var_child, reinterpret_cast<IDispatch**>(&result))) {
-    return result;
-  }
-
-  return NULL;
-}
-
-void AccessibleWebViewRegistry::QueryIAccessible2Interface(View* web_view) {
-  IAccessible* web_view_accessible = web_view->GetNativeViewAccessible();
-  if (!web_view_accessible)
-    return;
-
-  base::win::ScopedComPtr<IServiceProvider> service_provider;
-  if (S_OK != web_view_accessible->QueryInterface(service_provider.Receive()))
-    return;
-  base::win::ScopedComPtr<IAccessible2> iaccessible2;
-  service_provider->QueryService(
-      IID_IAccessible, IID_IAccessible2,
-      reinterpret_cast<void**>(iaccessible2.Receive()));
-}
-
-}  // anonymous namespace
-
-// static
-long NativeViewAccessibilityWin::next_unique_id_ = 1;
-int NativeViewAccessibilityWin::view_storage_ids_[kMaxViewStorageIds] = {0};
-int NativeViewAccessibilityWin::next_view_storage_id_index_ = 0;
-std::vector<int> NativeViewAccessibilityWin::alert_target_view_storage_ids_;
 
 // static
 NativeViewAccessibility* NativeViewAccessibility::Create(View* view) {
-  // Make sure ATL is initialized in this module.
-  ui::win::CreateATLModuleIfNeeded();
-
-  CComObject<NativeViewAccessibilityWin>* instance = NULL;
-  HRESULT hr = CComObject<NativeViewAccessibilityWin>::CreateInstance(
-      &instance);
-  DCHECK(SUCCEEDED(hr));
-  instance->set_view(view);
-  instance->AddRef();
-  return instance;
+  return new NativeViewAccessibilityWin(view);
 }
 
-NativeViewAccessibilityWin::NativeViewAccessibilityWin()
-    : unique_id_(next_unique_id_++) {
+NativeViewAccessibilityWin::NativeViewAccessibilityWin(View* view)
+    : NativeViewAccessibility(view) {
 }
 
 NativeViewAccessibilityWin::~NativeViewAccessibilityWin() {
-  RemoveAlertTarget();
 }
 
-void NativeViewAccessibilityWin::NotifyAccessibilityEvent(
-    ui::AXEvent event_type) {
-  if (!view_)
-    return;
+gfx::NativeViewAccessible NativeViewAccessibilityWin::GetParent() {
+  IAccessible* parent = NativeViewAccessibility::GetParent();
+  if (parent)
+    return parent;
 
-  ViewStorage* view_storage = ViewStorage::GetInstance();
   HWND hwnd = HWNDForView(view_);
-  int view_storage_id = view_storage_ids_[next_view_storage_id_index_];
-  if (view_storage_id == 0) {
-    view_storage_id = view_storage->CreateStorageID();
-    view_storage_ids_[next_view_storage_id_index_] = view_storage_id;
-  } else {
-    view_storage->RemoveView(view_storage_id);
-  }
-  view_storage->StoreView(view_storage_id, view_);
-
-  // Positive child ids are used for enumerating direct children,
-  // negative child ids can be used as unique ids to refer to a specific
-  // descendants.  Make index into view_storage_ids_ into a negative child id.
-  int child_id =
-      base::win::kFirstViewsAccessibilityId - next_view_storage_id_index_;
-  ::NotifyWinEvent(MSAAEvent(event_type), hwnd, OBJID_CLIENT, child_id);
-  next_view_storage_id_index_ =
-      (next_view_storage_id_index_ + 1) % kMaxViewStorageIds;
-
-  // Keep track of views that are a target of an alert event.
-  if (event_type == ui::AX_EVENT_ALERT)
-    AddAlertTarget();
-}
-
-gfx::NativeViewAccessible NativeViewAccessibilityWin::GetNativeObject() {
-  return this;
-}
-
-void NativeViewAccessibilityWin::Destroy() {
-  view_ = NULL;
-  Release();
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::accHitTest(
-    LONG x_left, LONG y_top, VARIANT* child) {
-  if (!child)
-    return E_INVALIDARG;
-
-  if (!view_ || !view_->GetWidget())
-    return E_FAIL;
-
-  // If this is a root view, our widget might have child widgets.
-  // Search child widgets first, since they're on top in the z-order.
-  if (view_->GetWidget()->GetRootView() == view_) {
-    std::vector<Widget*> child_widgets;
-    PopulateChildWidgetVector(&child_widgets);
-    for (size_t i = 0; i < child_widgets.size(); ++i) {
-      Widget* child_widget = child_widgets[i];
-      IAccessible* child_accessible =
-          child_widget->GetRootView()->GetNativeViewAccessible();
-      HRESULT result = child_accessible->accHitTest(x_left, y_top, child);
-      if (result == S_OK)
-        return result;
-    }
-  }
-
-  gfx::Point point(x_left, y_top);
-  View::ConvertPointFromScreen(view_, &point);
-
-  // If the point is not inside this view, return false.
-  if (!view_->HitTestPoint(point)) {
-    child->vt = VT_EMPTY;
-    return S_FALSE;
-  }
-
-  // Check if the point is within any of the immediate children of this
-  // view.
-  View* hit_child_view = NULL;
-  for (int i = view_->child_count() - 1; i >= 0; --i) {
-    View* child_view = view_->child_at(i);
-    if (!child_view->visible())
-      continue;
-
-    gfx::Point point_in_child_coords(point);
-    view_->ConvertPointToTarget(view_, child_view, &point_in_child_coords);
-    if (child_view->HitTestPoint(point_in_child_coords)) {
-      hit_child_view = child_view;
-      break;
-    }
-  }
-
-  // If the point was within one of this view's immediate children,
-  // call accHitTest recursively on that child's native view accessible -
-  // which may be a recursive call to this function or it may be overridden,
-  // for example in the case of a WebView.
-  if (hit_child_view) {
-    HRESULT result = hit_child_view->GetNativeViewAccessible()->accHitTest(
-        x_left, y_top, child);
-
-    // If the recursive call returned CHILDID_SELF, we have to convert that
-    // into a VT_DISPATCH for the return value to this call.
-    if (S_OK == result && child->vt == VT_I4 && child->lVal == CHILDID_SELF) {
-      child->vt = VT_DISPATCH;
-      child->pdispVal = hit_child_view->GetNativeViewAccessible();
-      // Always increment ref when returning a reference to a COM object.
-      child->pdispVal->AddRef();
-    }
-    return result;
-  }
-
-  // This object is the best match, so return CHILDID_SELF. It's tempting to
-  // simplify the logic and use VT_DISPATCH everywhere, but the Windows
-  // call AccessibleObjectFromPoint will keep calling accHitTest until some
-  // object returns CHILDID_SELF.
-  child->vt = VT_I4;
-  child->lVal = CHILDID_SELF;
-  return S_OK;
-}
-
-HRESULT NativeViewAccessibilityWin::accDoDefaultAction(VARIANT var_id) {
-  if (!IsValidId(var_id))
-    return E_INVALIDARG;
-
-  // The object does not support the method. This value is returned for
-  // controls that do not perform actions, such as edit fields.
-  return DISP_E_MEMBERNOTFOUND;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::accLocation(
-    LONG* x_left, LONG* y_top, LONG* width, LONG* height, VARIANT var_id) {
-  if (!IsValidId(var_id) || !x_left || !y_top || !width || !height)
-    return E_INVALIDARG;
-
-  if (!view_)
-    return E_FAIL;
-
-  if (!view_->bounds().IsEmpty()) {
-    *width  = view_->width();
-    *height = view_->height();
-    gfx::Point topleft(view_->bounds().origin());
-    View::ConvertPointToScreen(
-        view_->parent() ? view_->parent() : view_, &topleft);
-    *x_left = topleft.x();
-    *y_top  = topleft.y();
-  } else {
-    return E_FAIL;
-  }
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::accNavigate(
-    LONG nav_dir, VARIANT start, VARIANT* end) {
-  if (start.vt != VT_I4 || !end)
-    return E_INVALIDARG;
-
-  if (!view_)
-    return E_FAIL;
-
-  switch (nav_dir) {
-    case NAVDIR_FIRSTCHILD:
-    case NAVDIR_LASTCHILD: {
-      if (start.lVal != CHILDID_SELF) {
-        // Start of navigation must be on the View itself.
-        return E_INVALIDARG;
-      } else if (!view_->has_children()) {
-        // No children found.
-        return S_FALSE;
-      }
-
-      // Set child_id based on first or last child.
-      int child_id = 0;
-      if (nav_dir == NAVDIR_LASTCHILD)
-        child_id = view_->child_count() - 1;
-
-      View* child = view_->child_at(child_id);
-      end->vt = VT_DISPATCH;
-      end->pdispVal = child->GetNativeViewAccessible();
-      end->pdispVal->AddRef();
-      return S_OK;
-    }
-    case NAVDIR_LEFT:
-    case NAVDIR_UP:
-    case NAVDIR_PREVIOUS:
-    case NAVDIR_RIGHT:
-    case NAVDIR_DOWN:
-    case NAVDIR_NEXT: {
-      // Retrieve parent to access view index and perform bounds checking.
-      View* parent = view_->parent();
-      if (!parent) {
-        return E_FAIL;
-      }
-
-      if (start.lVal == CHILDID_SELF) {
-        int view_index = parent->GetIndexOf(view_);
-        // Check navigation bounds, adjusting for View child indexing (MSAA
-        // child indexing starts with 1, whereas View indexing starts with 0).
-        if (!IsValidNav(nav_dir, view_index, -1,
-                        parent->child_count() - 1)) {
-          // Navigation attempted to go out-of-bounds.
-          end->vt = VT_EMPTY;
-          return S_FALSE;
-        } else {
-          if (IsNavDirNext(nav_dir)) {
-            view_index += 1;
-          } else {
-            view_index -=1;
-          }
-        }
-
-        View* child = parent->child_at(view_index);
-        end->pdispVal = child->GetNativeViewAccessible();
-        end->vt = VT_DISPATCH;
-        end->pdispVal->AddRef();
-        return S_OK;
-      } else {
-        // Check navigation bounds, adjusting for MSAA child indexing (MSAA
-        // child indexing starts with 1, whereas View indexing starts with 0).
-        if (!IsValidNav(nav_dir, start.lVal, 0, parent->child_count() + 1)) {
-            // Navigation attempted to go out-of-bounds.
-            end->vt = VT_EMPTY;
-            return S_FALSE;
-          } else {
-            if (IsNavDirNext(nav_dir)) {
-              start.lVal += 1;
-            } else {
-              start.lVal -= 1;
-            }
-        }
-
-        HRESULT result = this->get_accChild(start, &end->pdispVal);
-        if (result == S_FALSE) {
-          // Child is a leaf.
-          end->vt = VT_I4;
-          end->lVal = start.lVal;
-        } else if (result == E_INVALIDARG) {
-          return E_INVALIDARG;
-        } else {
-          // Child is not a leaf.
-          end->vt = VT_DISPATCH;
-        }
-      }
-      break;
-    }
-    default:
-      return E_INVALIDARG;
-  }
-  // Navigation performed correctly. Global return for this function, if no
-  // error triggered an escape earlier.
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accChild(VARIANT var_child,
-                                                      IDispatch** disp_child) {
-  if (var_child.vt != VT_I4 || !disp_child)
-    return E_INVALIDARG;
-
-  if (!view_ || !view_->GetWidget())
-    return E_FAIL;
-
-  LONG child_id = V_I4(&var_child);
-
-  if (child_id == CHILDID_SELF) {
-    // Remain with the same dispatch.
-    return S_OK;
-  }
-
-  // If this is a root view, our widget might have child widgets. Include
-  std::vector<Widget*> child_widgets;
-  if (view_->GetWidget()->GetRootView() == view_)
-    PopulateChildWidgetVector(&child_widgets);
-  int child_widget_count = static_cast<int>(child_widgets.size());
-
-  View* child_view = NULL;
-  if (child_id > 0) {
-    // Positive child ids are a 1-based child index, used by clients
-    // that want to enumerate all immediate children.
-    int child_id_as_index = child_id - 1;
-    if (child_id_as_index < view_->child_count()) {
-      child_view = view_->child_at(child_id_as_index);
-    } else if (child_id_as_index < view_->child_count() + child_widget_count) {
-      Widget* child_widget =
-          child_widgets[child_id_as_index - view_->child_count()];
-      child_view = child_widget->GetRootView();
-    }
-  } else {
-    // Negative child ids can be used to map to any descendant.
-    // Check child widget first.
-    for (int i = 0; i < child_widget_count; i++) {
-      Widget* child_widget = child_widgets[i];
-      IAccessible* child_accessible =
-          child_widget->GetRootView()->GetNativeViewAccessible();
-      HRESULT result = child_accessible->get_accChild(var_child, disp_child);
-      if (result == S_OK)
-        return result;
-    }
-
-    // We map child ids to a view storage id that can refer to a
-    // specific view (if that view still exists).
-    int view_storage_id_index =
-        base::win::kFirstViewsAccessibilityId - child_id;
-    if (view_storage_id_index >= 0 &&
-        view_storage_id_index < kMaxViewStorageIds) {
-      int view_storage_id = view_storage_ids_[view_storage_id_index];
-      ViewStorage* view_storage = ViewStorage::GetInstance();
-      child_view = view_storage->RetrieveView(view_storage_id);
-    } else {
-      *disp_child = AccessibleWebViewRegistry::GetInstance()->
-          GetAccessibleFromWebView(view_, child_id);
-      if (*disp_child)
-        return S_OK;
-    }
-  }
-
-  if (!child_view) {
-    // No child found.
-    *disp_child = NULL;
-    return E_FAIL;
-  }
-
-  *disp_child = child_view->GetNativeViewAccessible();
-  if (*disp_child) {
-    (*disp_child)->AddRef();
-    return S_OK;
-  }
-
-  return E_FAIL;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accChildCount(LONG* child_count) {
-  if (!child_count)
-    return E_INVALIDARG;
-
-  if (!view_ || !view_->GetWidget())
-    return E_FAIL;
-
-  *child_count = view_->child_count();
-
-  // If this is a root view, our widget might have child widgets. Include
-  // them, too.
-  if (view_->GetWidget()->GetRootView() == view_) {
-    std::vector<Widget*> child_widgets;
-    PopulateChildWidgetVector(&child_widgets);
-    *child_count += child_widgets.size();
-  }
-
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accDefaultAction(
-    VARIANT var_id, BSTR* def_action) {
-  if (!IsValidId(var_id) || !def_action)
-    return E_INVALIDARG;
-
-  if (!view_)
-    return E_FAIL;
-
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-  base::string16 temp_action = state.default_action;
-
-  if (!temp_action.empty()) {
-    *def_action = SysAllocString(temp_action.c_str());
-  } else {
-    return S_FALSE;
-  }
-
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accDescription(
-    VARIANT var_id, BSTR* desc) {
-  if (!IsValidId(var_id) || !desc)
-    return E_INVALIDARG;
-
-  if (!view_)
-    return E_FAIL;
-
-  base::string16 temp_desc;
-
-  view_->GetTooltipText(gfx::Point(), &temp_desc);
-  if (!temp_desc.empty()) {
-    *desc = SysAllocString(temp_desc.c_str());
-  } else {
-    return S_FALSE;
-  }
-
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accFocus(VARIANT* focus_child) {
-  if (!focus_child)
-    return E_INVALIDARG;
-
-  if (!view_)
-    return E_FAIL;
-
-  FocusManager* focus_manager = view_->GetFocusManager();
-  View* focus = focus_manager ? focus_manager->GetFocusedView() : NULL;
-  if (focus == view_) {
-    // This view has focus.
-    focus_child->vt = VT_I4;
-    focus_child->lVal = CHILDID_SELF;
-  } else if (focus && view_->Contains(focus)) {
-    // Return the child object that has the keyboard focus.
-    focus_child->vt = VT_DISPATCH;
-    focus_child->pdispVal = focus->GetNativeViewAccessible();
-    focus_child->pdispVal->AddRef();
-    return S_OK;
-  } else {
-    // Neither this object nor any of its children has the keyboard focus.
-    focus_child->vt = VT_EMPTY;
-  }
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accKeyboardShortcut(
-    VARIANT var_id, BSTR* acc_key) {
-  if (!IsValidId(var_id) || !acc_key)
-    return E_INVALIDARG;
-
-  if (!view_)
-    return E_FAIL;
-
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-  base::string16 temp_key = state.keyboard_shortcut;
-
-  if (!temp_key.empty()) {
-    *acc_key = SysAllocString(temp_key.c_str());
-  } else {
-    return S_FALSE;
-  }
-
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accName(
-    VARIANT var_id, BSTR* name) {
-  if (!IsValidId(var_id) || !name)
-    return E_INVALIDARG;
-
-  if (!view_)
-    return E_FAIL;
-
-  // Retrieve the current view's name.
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-  base::string16 temp_name = state.name;
-  if (!temp_name.empty()) {
-    // Return name retrieved.
-    *name = SysAllocString(temp_name.c_str());
-  } else {
-    // If view has no name, return S_FALSE.
-    return S_FALSE;
-  }
-
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accParent(
-    IDispatch** disp_parent) {
-  if (!disp_parent)
-    return E_INVALIDARG;
-
-  if (!view_)
-    return E_FAIL;
-
-  *disp_parent = NULL;
-  View* parent_view = view_->parent();
-
-  if (!parent_view) {
-    HWND hwnd = HWNDForView(view_);
-    if (!hwnd)
-      return S_FALSE;
-
-    return ::AccessibleObjectFromWindow(
-        hwnd, OBJID_WINDOW, IID_IAccessible,
-        reinterpret_cast<void**>(disp_parent));
-  }
-
-  *disp_parent = parent_view->GetNativeViewAccessible();
-  (*disp_parent)->AddRef();
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accRole(
-    VARIANT var_id, VARIANT* role) {
-  if (!IsValidId(var_id) || !role)
-    return E_INVALIDARG;
-
-  if (!view_)
-    return E_FAIL;
-
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-  role->vt = VT_I4;
-  role->lVal = MSAARole(state.role);
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accState(
-    VARIANT var_id, VARIANT* state) {
-  // This returns MSAA states. See also the IAccessible2 interface
-  // get_states().
-
-  if (!IsValidId(var_id) || !state)
-    return E_INVALIDARG;
-
-  if (!view_)
-    return E_FAIL;
-
-  state->vt = VT_I4;
-
-  // Retrieve all currently applicable states of the parent.
-  SetState(state, view_);
-
-  // Make sure that state is not empty, and has the proper type.
-  if (state->vt == VT_EMPTY)
-    return E_FAIL;
-
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accValue(VARIANT var_id,
-                                                      BSTR* value) {
-  if (!IsValidId(var_id) || !value)
-    return E_INVALIDARG;
-
-  if (!view_)
-    return E_FAIL;
-
-  // Retrieve the current view's value.
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-  base::string16 temp_value = state.value;
-
-  if (!temp_value.empty()) {
-    // Return value retrieved.
-    *value = SysAllocString(temp_value.c_str());
-  } else {
-    // If view has no value, fall back into the default implementation.
-    *value = NULL;
-    return E_NOTIMPL;
-  }
-
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::put_accValue(VARIANT var_id,
-                                                      BSTR new_value) {
-  if (!IsValidId(var_id) || !new_value)
-    return E_INVALIDARG;
-
-  if (!view_)
-    return E_FAIL;
-
-  // Return an error if the view can't set the value.
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-  if (state.set_value_callback.is_null())
-    return E_FAIL;
-
-  state.set_value_callback.Run(new_value);
-  return S_OK;
-}
-
-// IAccessible functions not supported.
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accSelection(VARIANT* selected) {
-  if (selected)
-    selected->vt = VT_EMPTY;
-  return E_NOTIMPL;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::accSelect(
-    LONG flagsSelect, VARIANT var_id) {
-  return E_NOTIMPL;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accHelp(
-    VARIANT var_id, BSTR* help) {
-  if (!IsValidId(var_id) || !help)
-    return E_INVALIDARG;
-
-  if (!view_)
-    return E_FAIL;
-
-  base::string16 temp = base::UTF8ToUTF16(view_->GetClassName());
-  *help = SysAllocString(temp.c_str());
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_accHelpTopic(
-    BSTR* help_file, VARIANT var_id, LONG* topic_id) {
-  if (help_file) {
-    *help_file = NULL;
-  }
-  if (topic_id) {
-    *topic_id = static_cast<LONG>(-1);
-  }
-  return E_NOTIMPL;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::put_accName(
-    VARIANT var_id, BSTR put_name) {
-  // Deprecated.
-  return E_NOTIMPL;
-}
-
-//
-// IAccessible2
-//
-
-STDMETHODIMP NativeViewAccessibilityWin::role(LONG* role) {
-  if (!view_)
-    return E_FAIL;
-
-  if (!role)
-    return E_INVALIDARG;
-
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-  *role = MSAARole(state.role);
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_states(AccessibleStates* states) {
-  // This returns IAccessible2 states, which supplement MSAA states.
-  // See also the MSAA interface get_accState.
-
-  if (!view_)
-    return E_FAIL;
-
-  if (!states)
-    return E_INVALIDARG;
-
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-
-  // There are only a couple of states we need to support
-  // in IAccessible2. If any more are added, we may want to
-  // add a helper function like MSAAState.
-  *states = IA2_STATE_OPAQUE;
-  if (state.HasStateFlag(ui::AX_STATE_EDITABLE))
-    *states |= IA2_STATE_EDITABLE;
-
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_uniqueID(LONG* unique_id) {
-  if (!view_)
-    return E_FAIL;
-
-  if (!unique_id)
-    return E_INVALIDARG;
-
-  *unique_id = unique_id_;
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_windowHandle(HWND* window_handle) {
-  if (!view_)
-    return E_FAIL;
-
-  if (!window_handle)
-    return E_INVALIDARG;
-
-  *window_handle = HWNDForView(view_);
-  return *window_handle ? S_OK : S_FALSE;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_relationTargetsOfType(
-    BSTR type_bstr,
-    long max_targets,
-    IUnknown ***targets,
-    long *n_targets) {
-  if (!view_)
-    return E_FAIL;
-
-  if (!targets || !n_targets)
-    return E_INVALIDARG;
-
-  *n_targets = 0;
-  *targets = NULL;
-
-  // Only respond to requests for relations of type "alerts" on the
-  // root view.
-  base::string16 type(type_bstr);
-  if (type != L"alerts" || view_->parent())
-    return S_FALSE;
-
-  // Collect all of the alert views that are still valid.
-  std::vector<View*> alert_views;
-  ViewStorage* view_storage = ViewStorage::GetInstance();
-  for (size_t i = 0; i < alert_target_view_storage_ids_.size(); ++i) {
-    int view_storage_id = alert_target_view_storage_ids_[i];
-    View* view = view_storage->RetrieveView(view_storage_id);
-    if (!view || !view_->Contains(view))
-      continue;
-    alert_views.push_back(view);
-  }
-
-  long count = alert_views.size();
-  if (count == 0)
-    return S_FALSE;
-
-  // Don't return more targets than max_targets - but note that the caller
-  // is allowed to specify max_targets=0 to mean no limit.
-  if (max_targets > 0 && count > max_targets)
-    count = max_targets;
-
-  // Return the number of targets.
-  *n_targets = count;
-
-  // Allocate COM memory for the result array and populate it.
-  *targets = static_cast<IUnknown**>(
-      CoTaskMemAlloc(count * sizeof(IUnknown*)));
-  for (long i = 0; i < count; ++i) {
-    (*targets)[i] = alert_views[i]->GetNativeViewAccessible();
-    (*targets)[i]->AddRef();
-  }
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_attributes(BSTR* attributes) {
-  if (!view_)
-    return E_FAIL;
-
-  if (!attributes)
-    return E_INVALIDARG;
-
-  base::string16 attributes_str;
-
-  // Text fields need to report the attribute "text-model:a1" to instruct
-  // screen readers to use IAccessible2 APIs to handle text editing in this
-  // object (as opposed to treating it like a native Windows text box).
-  // The text-model:a1 attribute is documented here:
-  // http://www.linuxfoundation.org/collaborate/workgroups/accessibility/ia2/ia2_implementation_guide
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-  if (state.role == ui::AX_ROLE_TEXT_FIELD) {
-    attributes_str = L"text-model:a1;";
-  }
-
-  *attributes = SysAllocString(attributes_str.c_str());
-  DCHECK(*attributes);
-  return S_OK;
-}
-
-//
-// IAccessibleText
-//
-
-STDMETHODIMP NativeViewAccessibilityWin::get_nCharacters(LONG* n_characters) {
-  if (!view_)
-    return E_FAIL;
-
-  if (!n_characters)
-    return E_INVALIDARG;
-
-  base::string16 text = TextForIAccessibleText();
-  *n_characters = static_cast<LONG>(text.size());
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_caretOffset(LONG* offset) {
-  if (!view_)
-    return E_FAIL;
-
-  if (!offset)
-    return E_INVALIDARG;
-
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-  *offset = static_cast<LONG>(state.selection_end);
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_nSelections(LONG* n_selections) {
-  if (!view_)
-    return E_FAIL;
-
-  if (!n_selections)
-    return E_INVALIDARG;
-
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-  if (state.selection_start != state.selection_end)
-    *n_selections = 1;
-  else
-    *n_selections = 0;
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_selection(LONG selection_index,
-                                                      LONG* start_offset,
-                                                      LONG* end_offset) {
-  if (!view_)
-    return E_FAIL;
-
-  if (!start_offset || !end_offset || selection_index != 0)
-    return E_INVALIDARG;
-
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-  *start_offset = static_cast<LONG>(state.selection_start);
-  *end_offset = static_cast<LONG>(state.selection_end);
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_text(LONG start_offset,
-                                                  LONG end_offset,
-                                                  BSTR* text) {
-  if (!view_)
-    return E_FAIL;
-
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-  base::string16 text_str = TextForIAccessibleText();
-  LONG len = static_cast<LONG>(text_str.size());
-
-  if (start_offset == IA2_TEXT_OFFSET_LENGTH) {
-    start_offset = len;
-  } else if (start_offset == IA2_TEXT_OFFSET_CARET) {
-    start_offset = static_cast<LONG>(state.selection_end);
-  }
-  if (end_offset == IA2_TEXT_OFFSET_LENGTH) {
-    end_offset = static_cast<LONG>(text_str.size());
-  } else if (end_offset == IA2_TEXT_OFFSET_CARET) {
-    end_offset = static_cast<LONG>(state.selection_end);
-  }
-
-  // The spec allows the arguments to be reversed.
-  if (start_offset > end_offset) {
-    LONG tmp = start_offset;
-    start_offset = end_offset;
-    end_offset = tmp;
-  }
-
-  // The spec does not allow the start or end offsets to be out or range;
-  // we must return an error if so.
-  if (start_offset < 0)
-    return E_INVALIDARG;
-  if (end_offset > len)
-    return E_INVALIDARG;
-
-  base::string16 substr =
-      text_str.substr(start_offset, end_offset - start_offset);
-  if (substr.empty())
-    return S_FALSE;
-
-  *text = SysAllocString(substr.c_str());
-  DCHECK(*text);
-  return S_OK;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_textAtOffset(
-    LONG offset,
-    enum IA2TextBoundaryType boundary_type,
-    LONG* start_offset, LONG* end_offset,
-    BSTR* text) {
-  if (!start_offset || !end_offset || !text)
-    return E_INVALIDARG;
-
-  // The IAccessible2 spec says we don't have to implement the "sentence"
-  // boundary type, we can just let the screenreader handle it.
-  if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) {
-    *start_offset = 0;
-    *end_offset = 0;
-    *text = NULL;
-    return S_FALSE;
-  }
-
-  const base::string16& text_str = TextForIAccessibleText();
-
-  *start_offset = FindBoundary(
-      text_str, boundary_type, offset, ui::BACKWARDS_DIRECTION);
-  *end_offset = FindBoundary(
-      text_str, boundary_type, offset, ui::FORWARDS_DIRECTION);
-  return get_text(*start_offset, *end_offset, text);
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_textBeforeOffset(
-    LONG offset,
-    enum IA2TextBoundaryType boundary_type,
-    LONG* start_offset, LONG* end_offset,
-    BSTR* text) {
-  if (!start_offset || !end_offset || !text)
-    return E_INVALIDARG;
-
-  // The IAccessible2 spec says we don't have to implement the "sentence"
-  // boundary type, we can just let the screenreader handle it.
-  if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) {
-    *start_offset = 0;
-    *end_offset = 0;
-    *text = NULL;
-    return S_FALSE;
-  }
-
-  const base::string16& text_str = TextForIAccessibleText();
-
-  *start_offset = FindBoundary(
-      text_str, boundary_type, offset, ui::BACKWARDS_DIRECTION);
-  *end_offset = offset;
-  return get_text(*start_offset, *end_offset, text);
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_textAfterOffset(
-    LONG offset,
-    enum IA2TextBoundaryType boundary_type,
-    LONG* start_offset, LONG* end_offset,
-    BSTR* text) {
-  if (!start_offset || !end_offset || !text)
-    return E_INVALIDARG;
-
-  // The IAccessible2 spec says we don't have to implement the "sentence"
-  // boundary type, we can just let the screenreader handle it.
-  if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) {
-    *start_offset = 0;
-    *end_offset = 0;
-    *text = NULL;
-    return S_FALSE;
-  }
-
-  const base::string16& text_str = TextForIAccessibleText();
-
-  *start_offset = offset;
-  *end_offset = FindBoundary(
-      text_str, boundary_type, offset, ui::FORWARDS_DIRECTION);
-  return get_text(*start_offset, *end_offset, text);
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::get_offsetAtPoint(
-    LONG x, LONG y, enum IA2CoordinateType coord_type, LONG* offset) {
-  if (!view_)
-    return E_FAIL;
-
-  if (!offset)
-    return E_INVALIDARG;
-
-  // We don't support this method, but we have to return something
-  // rather than E_NOTIMPL or screen readers will complain.
-  *offset = 0;
-  return S_OK;
-}
-
-//
-// IServiceProvider methods.
-//
-
-STDMETHODIMP NativeViewAccessibilityWin::QueryService(
-    REFGUID guidService, REFIID riid, void** object) {
-  if (!view_)
-    return E_FAIL;
-
-  if (riid == IID_IAccessible2 || riid == IID_IAccessible2_2)
-    AccessibleWebViewRegistry::GetInstance()->EnableIAccessible2Support();
-
-  if (guidService == IID_IAccessible ||
-      guidService == IID_IAccessible2 ||
-      guidService == IID_IAccessible2_2 ||
-      guidService == IID_IAccessibleText)  {
-    return QueryInterface(riid, object);
-  }
-
-  // We only support the IAccessibleEx interface on Windows 8 and above. This
-  // is needed for the On screen Keyboard to show up in metro mode, when the
-  // user taps an editable region in the window.
-  // All methods in the IAccessibleEx interface are unimplemented.
-  if (riid == IID_IAccessibleEx &&
-      base::win::GetVersion() >= base::win::VERSION_WIN8) {
-    return QueryInterface(riid, object);
-  }
-
-  *object = NULL;
-  return E_FAIL;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::GetPatternProvider(
-    PATTERNID id, IUnknown** provider) {
-  if (!view_)
-    return E_FAIL;
-
-  if (!provider)
-    return E_INVALIDARG;
-
-  DVLOG(1) << "In Function: "
-           << __FUNCTION__
-           << " for pattern id: "
-           << id;
-  if (id == UIA_ValuePatternId || id == UIA_TextPatternId) {
-    ui::AXViewState state;
-    view_->GetAccessibleState(&state);
-    long role = MSAARole(state.role);
-
-    if (role == ROLE_SYSTEM_TEXT) {
-      DVLOG(1) << "Returning UIA text provider";
-      base::win::UIATextProvider::CreateTextProvider(
-          state.value, true, provider);
-      return S_OK;
-    }
-  }
-  return E_NOTIMPL;
-}
-
-STDMETHODIMP NativeViewAccessibilityWin::GetPropertyValue(PROPERTYID id,
-                                                          VARIANT* ret) {
-  if (!view_)
-    return E_FAIL;
-
-  if (!ret)
-    return E_INVALIDARG;
-
-  DVLOG(1) << "In Function: "
-           << __FUNCTION__
-           << " for property id: "
-           << id;
-  if (id == UIA_ControlTypePropertyId) {
-    ui::AXViewState state;
-    view_->GetAccessibleState(&state);
-    long role = MSAARole(state.role);
-    if (role == ROLE_SYSTEM_TEXT) {
-      V_VT(ret) = VT_I4;
-      ret->lVal = UIA_EditControlTypeId;
-      DVLOG(1) << "Returning Edit control type";
-    } else {
-      DVLOG(1) << "Returning empty control type";
-      V_VT(ret) = VT_EMPTY;
-    }
-  } else {
-    V_VT(ret) = VT_EMPTY;
-  }
-  return S_OK;
-}
-
-//
-// Static methods.
-//
-
-void NativeViewAccessibility::RegisterWebView(View* web_view) {
-  AccessibleWebViewRegistry::GetInstance()->RegisterWebView(web_view);
-}
-
-void NativeViewAccessibility::UnregisterWebView(View* web_view) {
-  AccessibleWebViewRegistry::GetInstance()->UnregisterWebView(web_view);
-}
-
-int32 NativeViewAccessibilityWin::MSAAEvent(ui::AXEvent event) {
-  switch (event) {
-    case ui::AX_EVENT_ALERT:
-      return EVENT_SYSTEM_ALERT;
-    case ui::AX_EVENT_FOCUS:
-      return EVENT_OBJECT_FOCUS;
-    case ui::AX_EVENT_MENU_START:
-      return EVENT_SYSTEM_MENUSTART;
-    case ui::AX_EVENT_MENU_END:
-      return EVENT_SYSTEM_MENUEND;
-    case ui::AX_EVENT_MENU_POPUP_START:
-      return EVENT_SYSTEM_MENUPOPUPSTART;
-    case ui::AX_EVENT_MENU_POPUP_END:
-      return EVENT_SYSTEM_MENUPOPUPEND;
-    case ui::AX_EVENT_SELECTION:
-      return EVENT_OBJECT_SELECTION;
-    case ui::AX_EVENT_SELECTION_ADD:
-      return EVENT_OBJECT_SELECTIONADD;
-    case ui::AX_EVENT_SELECTION_REMOVE:
-      return EVENT_OBJECT_SELECTIONREMOVE;
-    case ui::AX_EVENT_TEXT_CHANGED:
-      return EVENT_OBJECT_NAMECHANGE;
-    case ui::AX_EVENT_TEXT_SELECTION_CHANGED:
-      return IA2_EVENT_TEXT_CARET_MOVED;
-    case ui::AX_EVENT_VALUE_CHANGED:
-      return EVENT_OBJECT_VALUECHANGE;
-    default:
-      // Not supported or invalid event.
-      NOTREACHED();
-      return -1;
-  }
-}
-
-int32 NativeViewAccessibilityWin::MSAARole(ui::AXRole role) {
-  switch (role) {
-    case ui::AX_ROLE_ALERT:
-      return ROLE_SYSTEM_ALERT;
-    case ui::AX_ROLE_APPLICATION:
-      return ROLE_SYSTEM_APPLICATION;
-    case ui::AX_ROLE_BUTTON_DROP_DOWN:
-      return ROLE_SYSTEM_BUTTONDROPDOWN;
-    case ui::AX_ROLE_POP_UP_BUTTON:
-      return ROLE_SYSTEM_BUTTONMENU;
-    case ui::AX_ROLE_CHECK_BOX:
-      return ROLE_SYSTEM_CHECKBUTTON;
-    case ui::AX_ROLE_COMBO_BOX:
-      return ROLE_SYSTEM_COMBOBOX;
-    case ui::AX_ROLE_DIALOG:
-      return ROLE_SYSTEM_DIALOG;
-    case ui::AX_ROLE_GROUP:
-      return ROLE_SYSTEM_GROUPING;
-    case ui::AX_ROLE_IMAGE:
-      return ROLE_SYSTEM_GRAPHIC;
-    case ui::AX_ROLE_LINK:
-      return ROLE_SYSTEM_LINK;
-    case ui::AX_ROLE_LOCATION_BAR:
-      return ROLE_SYSTEM_GROUPING;
-    case ui::AX_ROLE_MENU_BAR:
-      return ROLE_SYSTEM_MENUBAR;
-    case ui::AX_ROLE_MENU_ITEM:
-      return ROLE_SYSTEM_MENUITEM;
-    case ui::AX_ROLE_MENU_LIST_POPUP:
-      return ROLE_SYSTEM_MENUPOPUP;
-    case ui::AX_ROLE_TREE:
-      return ROLE_SYSTEM_OUTLINE;
-    case ui::AX_ROLE_TREE_ITEM:
-      return ROLE_SYSTEM_OUTLINEITEM;
-    case ui::AX_ROLE_TAB:
-      return ROLE_SYSTEM_PAGETAB;
-    case ui::AX_ROLE_TAB_LIST:
-      return ROLE_SYSTEM_PAGETABLIST;
-    case ui::AX_ROLE_PANE:
-      return ROLE_SYSTEM_PANE;
-    case ui::AX_ROLE_PROGRESS_INDICATOR:
-      return ROLE_SYSTEM_PROGRESSBAR;
-    case ui::AX_ROLE_BUTTON:
-      return ROLE_SYSTEM_PUSHBUTTON;
-    case ui::AX_ROLE_RADIO_BUTTON:
-      return ROLE_SYSTEM_RADIOBUTTON;
-    case ui::AX_ROLE_SCROLL_BAR:
-      return ROLE_SYSTEM_SCROLLBAR;
-    case ui::AX_ROLE_SPLITTER:
-      return ROLE_SYSTEM_SEPARATOR;
-    case ui::AX_ROLE_SLIDER:
-      return ROLE_SYSTEM_SLIDER;
-    case ui::AX_ROLE_STATIC_TEXT:
-      return ROLE_SYSTEM_STATICTEXT;
-    case ui::AX_ROLE_TEXT_FIELD:
-      return ROLE_SYSTEM_TEXT;
-    case ui::AX_ROLE_TITLE_BAR:
-      return ROLE_SYSTEM_TITLEBAR;
-    case ui::AX_ROLE_TOOLBAR:
-      return ROLE_SYSTEM_TOOLBAR;
-    case ui::AX_ROLE_WEB_VIEW:
-      return ROLE_SYSTEM_GROUPING;
-    case ui::AX_ROLE_WINDOW:
-      return ROLE_SYSTEM_WINDOW;
-    case ui::AX_ROLE_CLIENT:
-    default:
-      // This is the default role for MSAA.
-      return ROLE_SYSTEM_CLIENT;
-  }
-}
-
-int32 NativeViewAccessibilityWin::MSAAState(const ui::AXViewState& state) {
-  // This maps MSAA states for get_accState(). See also the IAccessible2
-  // interface get_states().
-
-  int32 msaa_state = 0;
-  if (state.HasStateFlag(ui::AX_STATE_CHECKED))
-    msaa_state |= STATE_SYSTEM_CHECKED;
-  if (state.HasStateFlag(ui::AX_STATE_COLLAPSED))
-    msaa_state |= STATE_SYSTEM_COLLAPSED;
-  if (state.HasStateFlag(ui::AX_STATE_DEFAULT))
-    msaa_state |= STATE_SYSTEM_DEFAULT;
-  if (state.HasStateFlag(ui::AX_STATE_EXPANDED))
-    msaa_state |= STATE_SYSTEM_EXPANDED;
-  if (state.HasStateFlag(ui::AX_STATE_HASPOPUP))
-    msaa_state |= STATE_SYSTEM_HASPOPUP;
-  if (state.HasStateFlag(ui::AX_STATE_HOVERED))
-    msaa_state |= STATE_SYSTEM_HOTTRACKED;
-  if (state.HasStateFlag(ui::AX_STATE_INVISIBLE))
-    msaa_state |= STATE_SYSTEM_INVISIBLE;
-  if (state.HasStateFlag(ui::AX_STATE_LINKED))
-    msaa_state |= STATE_SYSTEM_LINKED;
-  if (state.HasStateFlag(ui::AX_STATE_OFFSCREEN))
-    msaa_state |= STATE_SYSTEM_OFFSCREEN;
-  if (state.HasStateFlag(ui::AX_STATE_PRESSED))
-    msaa_state |= STATE_SYSTEM_PRESSED;
-  if (state.HasStateFlag(ui::AX_STATE_PROTECTED))
-    msaa_state |= STATE_SYSTEM_PROTECTED;
-  if (state.HasStateFlag(ui::AX_STATE_READ_ONLY))
-    msaa_state |= STATE_SYSTEM_READONLY;
-  if (state.HasStateFlag(ui::AX_STATE_SELECTABLE))
-    msaa_state |= STATE_SYSTEM_SELECTABLE;
-  if (state.HasStateFlag(ui::AX_STATE_SELECTED))
-    msaa_state |= STATE_SYSTEM_SELECTED;
-  if (state.HasStateFlag(ui::AX_STATE_FOCUSED))
-    msaa_state |= STATE_SYSTEM_FOCUSED;
-  if (state.HasStateFlag(ui::AX_STATE_DISABLED))
-    msaa_state |= STATE_SYSTEM_UNAVAILABLE;
-  return msaa_state;
-}
-
-//
-// Private methods.
-//
-
-bool NativeViewAccessibilityWin::IsNavDirNext(int nav_dir) const {
-  return (nav_dir == NAVDIR_RIGHT ||
-          nav_dir == NAVDIR_DOWN ||
-          nav_dir == NAVDIR_NEXT);
-}
-
-bool NativeViewAccessibilityWin::IsValidNav(
-    int nav_dir, int start_id, int lower_bound, int upper_bound) const {
-  if (IsNavDirNext(nav_dir)) {
-    if ((start_id + 1) > upper_bound) {
-      return false;
-    }
-  } else {
-    if ((start_id - 1) <= lower_bound) {
-      return false;
-    }
-  }
-  return true;
-}
-
-bool NativeViewAccessibilityWin::IsValidId(const VARIANT& child) const {
-  // View accessibility returns an IAccessible for each view so we only support
-  // the CHILDID_SELF id.
-  return (VT_I4 == child.vt) && (CHILDID_SELF == child.lVal);
-}
-
-void NativeViewAccessibilityWin::SetState(
-    VARIANT* msaa_state, View* view) {
-  // Ensure the output param is initialized to zero.
-  msaa_state->lVal = 0;
-
-  // Default state; all views can have accessibility focus.
-  msaa_state->lVal |= STATE_SYSTEM_FOCUSABLE;
-
-  if (!view)
-    return;
-
-  if (!view->enabled())
-    msaa_state->lVal |= STATE_SYSTEM_UNAVAILABLE;
-  if (!view->visible())
-    msaa_state->lVal |= STATE_SYSTEM_INVISIBLE;
-  if (!strcmp(view->GetClassName(), CustomButton::kViewClassName)) {
-    CustomButton* button = static_cast<CustomButton*>(view);
-    if (button->IsHotTracked())
-      msaa_state->lVal |= STATE_SYSTEM_HOTTRACKED;
-  }
-  if (view->HasFocus())
-    msaa_state->lVal |= STATE_SYSTEM_FOCUSED;
-
-  // Add on any view-specific states.
-  ui::AXViewState view_state;
-  view->GetAccessibleState(&view_state);
-  msaa_state->lVal |= MSAAState(view_state);
-}
-
-base::string16 NativeViewAccessibilityWin::TextForIAccessibleText() {
-  ui::AXViewState state;
-  view_->GetAccessibleState(&state);
-  if (state.role == ui::AX_ROLE_TEXT_FIELD)
-    return state.value;
-  else
-    return state.name;
-}
-
-void NativeViewAccessibilityWin::HandleSpecialTextOffset(
-    const base::string16& text, LONG* offset) {
-  if (*offset == IA2_TEXT_OFFSET_LENGTH) {
-    *offset = static_cast<LONG>(text.size());
-  } else if (*offset == IA2_TEXT_OFFSET_CARET) {
-    get_caretOffset(offset);
-  }
-}
-
-ui::TextBoundaryType NativeViewAccessibilityWin::IA2TextBoundaryToTextBoundary(
-    IA2TextBoundaryType ia2_boundary) {
-  switch(ia2_boundary) {
-    case IA2_TEXT_BOUNDARY_CHAR: return ui::CHAR_BOUNDARY;
-    case IA2_TEXT_BOUNDARY_WORD: return ui::WORD_BOUNDARY;
-    case IA2_TEXT_BOUNDARY_LINE: return ui::LINE_BOUNDARY;
-    case IA2_TEXT_BOUNDARY_SENTENCE: return ui::SENTENCE_BOUNDARY;
-    case IA2_TEXT_BOUNDARY_PARAGRAPH: return ui::PARAGRAPH_BOUNDARY;
-    case IA2_TEXT_BOUNDARY_ALL: return ui::ALL_BOUNDARY;
-    default:
-      NOTREACHED();
-      return ui::CHAR_BOUNDARY;
-  }
-}
-
-LONG NativeViewAccessibilityWin::FindBoundary(
-    const base::string16& text,
-    IA2TextBoundaryType ia2_boundary,
-    LONG start_offset,
-    ui::TextBoundaryDirection direction) {
-  HandleSpecialTextOffset(text, &start_offset);
-  ui::TextBoundaryType boundary = IA2TextBoundaryToTextBoundary(ia2_boundary);
-  std::vector<int32> line_breaks;
-  return ui::FindAccessibleTextBoundary(
-      text, line_breaks, boundary, start_offset, direction);
-}
-
-void NativeViewAccessibilityWin::PopulateChildWidgetVector(
-    std::vector<Widget*>* result_child_widgets) {
-  const Widget* widget = view()->GetWidget();
-  if (!widget)
-    return;
-
-  std::set<Widget*> child_widgets;
-  Widget::GetAllOwnedWidgets(widget->GetNativeView(), &child_widgets);
-  for (std::set<Widget*>::const_iterator iter = child_widgets.begin();
-           iter != child_widgets.end(); ++iter) {
-    Widget* child_widget = *iter;
-    DCHECK_NE(widget, child_widget);
-
-    if (!child_widget->IsVisible())
-      continue;
-
-    if (widget->GetNativeWindowProperty(kWidgetNativeViewHostKey))
-      continue;
+  if (!hwnd)
+    return NULL;
 
-    result_child_widgets->push_back(child_widget);
-  }
-}
+  HRESULT hr = ::AccessibleObjectFromWindow(
+      hwnd, OBJID_WINDOW, IID_IAccessible,
+      reinterpret_cast<void**>(&parent));
+  if (SUCCEEDED(hr))
+    return parent;
 
-void NativeViewAccessibilityWin::AddAlertTarget() {
-  ViewStorage* view_storage = ViewStorage::GetInstance();
-  for (size_t i = 0; i < alert_target_view_storage_ids_.size(); ++i) {
-    int view_storage_id = alert_target_view_storage_ids_[i];
-    View* view = view_storage->RetrieveView(view_storage_id);
-    if (view == view_)
-      return;
-  }
-  int view_storage_id = view_storage->CreateStorageID();
-  view_storage->StoreView(view_storage_id, view_);
-  alert_target_view_storage_ids_.push_back(view_storage_id);
+  return NULL;
 }
 
-void NativeViewAccessibilityWin::RemoveAlertTarget() {
-  ViewStorage* view_storage = ViewStorage::GetInstance();
-  size_t i = 0;
-  while (i < alert_target_view_storage_ids_.size()) {
-    int view_storage_id = alert_target_view_storage_ids_[i];
-    View* view = view_storage->RetrieveView(view_storage_id);
-    if (view == NULL || view == view_) {
-      alert_target_view_storage_ids_.erase(
-          alert_target_view_storage_ids_.begin() + i);
-    } else {
-      ++i;
-    }
-  }
+gfx::AcceleratedWidget
+NativeViewAccessibilityWin::GetTargetForNativeAccessibilityEvent() {
+  return HWNDForView(view_);
 }
 
 }  // namespace views